SOG and designer Kiku Matsuda launch the Hidaka XR folder and FX fixed blade—rugged, Japanese-inspired knives built for outdoor adventure.
SOG has never been afraid to push boundaries, and the brand’s latest collaboration with master Japanese designer Kiku Matsuda proves it once again. August 2025 marks the debut of two new additions to the Hidaka series—the Hidaka XR folding knife and the Hidaka FX fixed blade. Both builds reflect Matsuda’s trademark blend of Japanese tradition and Western practicality, creating tools that are as striking to look at as they are dependable in the field.
The Hidaka XR takes the foundation of the original folder and turns up the performance. This isn’t just a cosmetic refresh. SOG gave the XR a 4-inch modified tanto blade made from CPM 3V steel—steel that’s known for taking abuse and holding an edge long after lesser alloys give out. Designed with outdoor use in mind, the XR can chop, pry, and slice with equal confidence. The textured Micarta handle not only looks the part, it locks into the hand, even when wet, and the company’s XR lock system secures the blade under up to 1,500 pounds of force. In practice, it feels closer to a fixed blade than a folder, making it a smart option for anyone who needs a folding knife that can survive hard use.
SOG Hidaka XR
Then there’s the Hidaka FX, a fixed blade that ticks all the boxes for serious outdoorsmen. Its 4.8-inch CRYO 3V steel blade, satin-finished for clean cuts, is built for durability and edge retention. A linen Micarta handle ensures a secure grip, while resisting heat, moisture, and impact. Add in the streamlined Kydex sheath, and the FX becomes an easy-carry knife ready for camp chores, trail tasks, or emergency situations.
Together, the Hidaka XR and FX show where SOG is headed—knives that merge artistry, ruggedness, and advanced engineering. With Matsuda’s design touch and SOG’s proven reputation for innovation since 1986, these new Hidakas aren’t just fresh models. They’re proof the brand is still redefining what a modern survival and outdoor knife can be.
Hot factory drops that made their debut at BLADE Show 2025.
From sexy folders to indispensable knife accessories, BLADE Show 2025 saw a ton of new drops. Nearly two months since the shindig, they’re still coming out. This is our last installment of the new show debuts for the summer and there’s definitely some lookers and doers in this crowd.
Kansept Hazard Bail Lock
Knife type: Folder Designer: Steven Dunnuck Blade length: 3.67” Blade steel: Stainless Rockwell hardness: 58-60 HRC Blade grind: Flat Blade finish: Satin/blackwash Handle material: Titanium Lock: Friction-actuated swing cam lock (no springs) Pocket clip: Tip-up, right-handed Weight: 5.78 ozs. Closed length: 4.54” Country of origin: China MSRP: To be announced Available: August 2025
Wicked Edge Venture Portable Sharpener
Sharpener type: Hand-held Designer: Wicked Edge Abrasive type(s): Diamond, ceramic, leather Grit assortment: 500-grit diamond stone, fine ceramic Angle option: 20 degrees Edges sharpened: Plain Dimensions: 7” x 1.5” x 1” Construction materials: Recycled ABS plastic Weight: 4 ozs. Special features: 20-degree knife guide holds your knife steady as you go across the stone Country of origin: USA MSRP: $40 Available: Preorder now, full launch late summer
McNees Knives Dixon Folder
Designer: Jonathan McNees Blade length: 3.75” Blade steel: MagnaCut stainless Rockwell hardness: 63-64 HRC Blade grind: Hollow Blade pattern: Clip point Blade finish: Atomic Stonewashed Construction: Screw Handle material: Titanium Lock: “Reeve/Walker Frame lock” Blade opener: Hole Pivot: Ceramic ball bearings Pocket clip: Titanium, tip-up Weight: .34 oz. Closed length: 4.5” Country of origin: USA MSRP: $625 Available: NOW
Spyderco Shaman Lightweight
Knife type: Folder Designer: BLADE Magazine Cutlery Hall-of-Fame® member Sal Glesser Blade length: 3.58” Blade steel: CTS® BD1N stainless Blade grind: Full-flat Blade pattern: Leaf shape Blade finish: Satin Construction: Screw construction w/nested, skeletonized stainless steel liners Handle material: FRN (fiberglass-reinforced nylon) Lock: Compression Lock® Opening mechanism: Manual one-hand open w/fully accessible Trademark Round Hole™ Pivot materials: Phosphor bronze washers Pocket clip: 4-position, stainless steel, tip-up/tip-down, left/right Weight: 4.8 ozs. Closed length: 4.7” Special features: Finger choil w/added gimping, pebbled textured FRN handles, a reduced weight of 9 percent from original Shaman, and available in both PlainEdge™ and SpyderEdge™ Country of origin: USA MSRP: $230 Available: Fall
Poikilo Blade Vader
Knife type: Folder Designer: TASKnives Blade length: 3” Blade steel: M398 stainless Rockwell hardness: 60-62 HRC Blade grind: “V” Blade pattern: Reverse tanto/modified sheepsfoot Blade finish: Dark Stonewash Construction: Sandwich Handle material: A proprietary titanium Lock: Axis Blade openers: Thumb stud and thumb hole Pivot materials: Bushing and phosphorous bronze washers Pocket clip: Titanium, right-hand carry Weight: 4.76 ozs. Closed length: 4.3” Special features: Screw-less design from PKB Country of origin: China MSRP: $420 (standard/base finish) Available: September/October
Browning South Slope
Blade length: 3” Blade material: D2 tool steel Rockwell hardness: 60-62 HRC Blade finish: Black stonewash Blade openers: Flipper and hole Pivot: Ball bearing Handle: Synthetic; burnt bronze; Cerakote® finish Pocket clip: Ambidextrous, tip-up Lock: Framelock Closed length: 4” Country of origin: Offshore MSRP: $79.99 Available: NOW
We review four exquisite factory-made damascus folders that deliver the elegant look of custom work at a more affordable price.
Quality damascus knives have always been elegant. The steel, known for its unique surface appearance, defines “upscale” when it comes to high-end factory or custom knives. An increasing number of factory brands seem to be offering select models in damascus, bringing the knives to the masses at less than custom prices. For a nominal fee over the cost of a premium factory model—sometimes even less—you can have an exquisite damascus piece for your collection or daily carry rotation.
The A.G. Russell Knives Slim Damascus Folder
The A.G. Russell Knives Slim Damascus Folder is one of the better bangs for the buck in the genre. The 3⅝-inch drop-point blade is a damascus san-mai hybrid of sorts, featuring a core of 9Cr13MoV stainless steel clad with stainless damascus on either side. The construction allows the blade to be made for a more affordable price while also offering a distinctive appearance with the center core showing through near the cutting edge.
The A.G. Russell’s 3-inch drop point blade is a damascus san-mai hybrid of sorts, featuring a core of 9Cr13MoV stainless steel clad with stainless damascus on either side.
The top of the thumb rest is notched for a non-slip grip, and the blade opens easily by a flipper tab. With the blade riding on a pair of caged bearings, the opening action is very smooth and sure. The 9Cr13MoV is a Chinese-made stainless that exhibits performance characteristics similar to the more familiar Japanese-made AUS-8 stainless.
The handle has stainless steel liners with beautiful chambray blue G-10 scales. The color is akin to a blueish gray that is less common for G-10. The double stainless liners are slightly oversized and chamfered for a refined appearance. A steel pocket clip carries the knife tip up. Overall construction is somewhat basic but executed extremely well.
Its overall slim form enables the folder to be carried comfortably in a variety of scenarios, from casual to full dress wear. As slender as it is, the handle remains a width that’s easy to grip and use. The smooth scales are slightly contoured to better fit the hand. The linerlock secures tight and safe, with zero blade play in any direction.
At about an eighth of an inch, the blade is moderately thick for such a slender folder. Add a shallow main grind bevel and there is a slight wedging effect when cutting cardboard, plastic foam and other materials, so you will have to apply a bit more force to get the blade through such media.
Cutting plastic foam into thin slices was a favorite edge tester of BLADE Magazine Cutlery Hall-of-Fame® member A.G. Russell, and the A.G. Russell Knives Slim Damascus Folder tackled the task with aplomb.
The handle is very straight, devoid of any features that prevent your hand from sliding forward or rearward. Combined with the blade grind, this doesn’t make the knife a good candidate for heavy/extended use. However, for casual and dress carry it’s perfect. It also makes a great folding steak knife. It’s low profile enough as not to catch unwanted attention in public. At a remarkably low manufacturer’s suggested retail price (MSRP) of $125, the knife represents a great value in a factory damascus folder. Made in China with the typical excellent manufacturing quality that is expected of such knives, the folder represents an excellent value.
Lionsteel’s Twain
Lionsteel’s Twain damascus folder stands out in a crowd. Lionsteel calls it a double integral folder for its one-piece handle and one-piece scale. The handle is a solid piece of machined titanium—nothing new, though not too common, either.
Lionsteel calls the Twain a double integral folder for its one-piece machined titanium handle and one-piece carbon-fiber scale.
It isn’t exactly the easiest nor most cost-effective manner of making a knife handle, but it has loads of “wow factor.” It incorporates considerable CNC machining to arrive at the one-piece handle and one-piece scale. The resulting construction explains the knife’s high cost. It is an extremely strong design since the handle is a true integral as opposed to being composed of multiple parts. It is shaped so that it seats your hand comfortably, especially for prolonged use. The integral scale is 3D-machined carbon fiber and incorporates an integral spacer as well. The scale flows continuously around the spine for an appearance unseen on few if any other production folders.
The knife carries very deep in a pocket, with the clip fastened to the handle butt. When the knife is in your pocket, all that’s visible is the clip. You practically do not feel a thing when carrying it. The weight of titanium and carbon fiber are at a minimum and do not bog you down at all.
The versatile, user-friendly drop-point blade is 3.15 inches of Chad Nichols stainless damascus. Called Scrambled, the pattern gets its name from its eye-catching radial shapes. The flat-ground blade features an oblong hole for easy opening with either hand. The blade spine is crowned, meaning there is a slight radius to it. This is a very nice touch that not all manufacturers offer. It also creates a comfortable surface for a finger rest.
The scale flows continuously around the spine of the Twain for an appearance unseen on few if any other production folders.
The Twain’s high-tech approach to design and manufacturing yields a folder that is both very stylish and functional. The blade has a sweeping belly that makes it easy to tackle mundane daily cutting tasks with ease, such as opening mail and packages, and even cutting food in a restaurant. It’s also not shy about tackling heavier cutting jobs like breaking down cardboard boxes. It is a lighter weight folder but feels very solid in-hand because of the integral titanium frame and super-secure button lock.
The MSRP of $542 gets you a high-end folder with top-flight materials made of the finest craftsmanship in Maniago, Italy.
Pro-Tech Knives Cambria
Known widely for superior-quality automatics, Pro-Tech Knives also makes equally exceptional manual folders such as the Cambria 2 button-lock flipper. The company released the updated version of the Cambria flipper this year, tweaking the design a bit for aesthetics and ergonomics—thus the Cambria 2. It’s designed primarily as an upscale EDC folder that combines style and function into one easy-to-carry package that comes in either a base, working knife format or a highly impressive full-dress model sure to please the most discriminating knife enthusiast.
The Cambria 2’s 3.5-inch drop-point blade of a ladder-pattern stainless damascus forged by Chad Nichols is slender and opens fast via the flipper tab.
The 3.5-inch drop-point blade of ladder-pattern stainless damascus forged by Chad Nichols is slender and opens fast via the flipper tab. The ergonomic aluminum handle is anodized black and has an integral lower guard to help keep your grip in place. The back end is oval shaped to conform to your hand. The maple burl inlay adds an organic touch to a high-tech knife. Each Cambria 2 comes with a deep carry pocket clip that totes the closed folder tip up. To add an ever-so-slight dash of panache, the lock button is inlaid with a mosaic pin.
Deploying the blade is a pure pleasure as it rides on a pair of caged bearings for super smooth action. Out of the box, the edge is super sharp and ready for work. In the pocket, the Cambria 2 rides comfortably. Due to its overall slender form, it practically disappears in your pocket. There is absolutely no bulk associated with this knife. You almost forget you have it! I really like how it slices. The flat grind thins the blade out nicely and gives the edge plenty of bite. Overall fit and finish is what you expect from Pro-Tech—flawless in every way. Country of origin: USA. MSRP: $570. Pro-Tech turns out each damascus piece in low quantities, so if you want one, you’d better act quickly.
Spartan Blades Harsey
The Spartan Blades Harsey 3.25 folder is a scaled-down, EDC-size version of the Spartan Harsey Folder. The company had been receiving requests for a smaller size that’s easier to carry and less bulky while still retaining the heavy-duty build of the original. Enter the 3.25—and just like the larger Harsey Folder, Spartan also offers the 3.25 in a more-dressed-up version sporting a damascus blade paired with a handle of your choice of plain or a decorative machined titanium. The test knife is the former, a damascus blade with a bead-blasted titanium handle, simply stated but elegantly executed.
The bead-blast titanium handle of the 3.25 boasts titanium hardware anodized a light blue for an interesting pop of color.
The drop-point blade is 3.25 (hence the name) inches of Chad Nichols stainless steel damascus in a raindrop pattern. Dual-machined titanium thumb studs provide ease of one-handed opening with either paw. The thumb rest on the spine has some traction notches for a nonslip grip and to apply more pressure to the blade. The bead-blast titanium handle boasts titanium hardware anodized a light blue for an interesting pop of color. The blade secures by a framelock, and a titanium pocket clip also anodized a light blue carries the closed knife tip up. It is a very handsome folder incorporating some heavy-duty elements that make it a great candidate for a user piece.
The 3.25 is a compact workhorse built to go the distance. The flat-ground blade can readily tackle most any daily cutting task: opening packages, breaking down cardboard boxes, slicing steak, or anything else that needs cutting, trimming or stripping. The blade opens smoothly with no play in any direction. It is very solid all around. Multiple finger grooves help seat your hand, providing no-slip control. All handle edges are chamfered to soften the grip and allow the knife to ride in your pocket comfortably. The blade is plenty sharp out of the box and ready for work. Country of origin: USA. MSRP: $545.
Discover the new Cold Steel Frenzy II folding knife, designed by Andrew Demko and inspired by the Japanese Kabutowari.
Cold Steel has never been shy about bold designs, and the new Frenzy II folding knife is no exception. Designed by custom knifemaker Andrew Demko, the Frenzy II takes its cues from the ancient Japanese Kabutowari and morphs those warrior-worthy aesthetics into a mega-folder ready for today’s EDC crowd.
Let’s start with the blade. At 5.5 inches, it’s not subtle—but it is refined. Forged from premium S35VN powdered steel, the long, flat edge and needle-sharp point make it as functional as it is fearsome. You get top-tier edge retention, durability and slicing performance, all dressed up with a satin line-grain polish and a deep fuller that plays with light like a katana in the sun.
But Cold Steel didn’t stop there. The Frenzy II is all about balance—of power and precision, size and slimness. Despite its impressive blade length, the handle is slim, flat and built for pocket comfort. Crafted from dual-tone, 3D CNC-machined G-10 scales, it’s grippy, eye-catching, and disappears under a shirt tail. This knife may look large, but it carries light and lean.
And yes, the Frenzy II comes equipped with Cold Steel’s bombproof Tri-Ad lock, so when that blade is deployed, it’s staying put. That kind of confidence is why Cold Steel has earned the trust of law enforcement, military and serious knife users for decades.
So, who’s the Frenzy II for? Anyone who appreciates a fusion of heritage-inspired design and modern performance. Whether you’re a collector, a gear geek, or someone who just wants a folding knife that can go toe-to-toe with fixed blades, this one’s worth a serious look.
Frenzi II Specs Weight: 5.7oz Blade Thickness: .14″ Blade Length: 5-1/2″ Blade Steel: American S35VN Handle Length/Material: 6 3/4″ Long Duo Tone G10 Overall Length: 12-14″ Additional Features: Pocket / Belt Clip Knife Type: Folder Blade Length Range: 5+ in Steel Family: CPM Blade Shape: Sheepsfoot Locking Mechanism: Tri-Ad Lock
Summer Steel: June’s Hottest Custom and Production Knives You Need to Know.
From mosaic fighters to modern flippers, this month’s standout blades bring a mix of artistic craftsmanship and everyday utility. Whether you’re in the market for a hand-forged Damascus showpiece or a no-nonsense EDC, June’s lineup has something sharp for every collector and user. Here’s a closer look at what’s turning heads in the knife world this month.
Miguel Navarro Fixed Blade
Blade length: 4.25” Blade material: Diamond Damascus by Baker Forge & Tool Blade grind: Hollow Scales: Fat Carbon Gold Snake w/black and red G-10 liners Weight: 7.4 ozs. Overall length: 9” Maker’s price for a similar knife (includes custom sheath): $550-$600 Maker: Miguel Navarro (SharpByCoop image)
Dale Holt Mosaic Fighter
Blade length: 10” Blade materials: 1084 carbon and 15N20 nickel alloy steels Blade grind: Flat Blade pattern: Clip-point recurve Handle material: Spalted sassafrass Spacers: Textured brass and nickel silver Guard: Blued mild steel Knife to know: Design features include an S-guard and dropped handle; Dale Holt is an ABS journeyman smith Overall length: 15” Maker’s price for a similar model: Contact maker for details Maker: Dale Holt (Jocelyn Frasier image)
Kelly Frasier Paring Knife
Kelly Frasier Paring Knife Blade length: 3.5” Blade material: 26C3 carbon steel Blade grind: Flat Blade finish: Mustard patina Scales: G-10 w/red liners Overall length: 7.5” Maker’s price for a similar model: Contact maker for details Maker: Kelly Frasier (Jocelyn Frasier image)
Sam Renwick Farmer’s Lockback
Knife type: Folder Blade length: 2.78” Blade steel: Nitro-V stainless Blade grind: Flat Blade @thickest: .98” Scales: Spalted maple Frame & bolsters: 416 stainless Knife to know: The bolsters are dovetailed Weight: 5.3 ozs. Closed length: 3.38” Maker’s price for a similar knife: $291 at press-time rate of exchange Maker: Sam Renwick (Rod Hoare image)
Bjorn Jacobsen Ghost Recon Chef
Blade length: 7.87” Blade material: 1084 (the black core) laminated w/stainless steel etched Blade grind: Flat w/forged texture on top half Blade @thickest: .118” Blade @widest: 1.97” Handle: Curly birch dyed w/black leather dye and sanded w/600 grit paper, then sanded mostly off again at 1500 grit, blue leather dyed and sanded w/1500 grit yet again; finished w/Uncle Bjorn’s Handle Finish Fittings: Stainless Weight: 6 ozs. Overall length: 12.6” Knife to know: Blade etched in ferric chloride to make the carbon migration “pop,” then left in instant coffee overnight to make the 1084 core black Maker’s price for a similar knife: $320 at press-time exchange rate Maker: Bjorn Jacobsen (Rod Hoare image)
Rob Wayman Knives Feather Damascus Fighter
Blade length: 8” Blade material: Feather damascus of 1084 carbon and 15N20 nickel-alloy steels Blade grind: Full flat Handle materials: Stabilized bog oak, black G-10 and stainless steel spacers, dyed/stabilized fossilized brain coral, and stabilized curly narra Guard & pommel: Feather damascus Overall length: 13.75” Sheath: By Rob Wayman; belt model of vegetable-tanned leather w/stingray inlay Maker’s price for a similar knife and sheath: $2,400 Maker’s remark: “I’m all about sole authorship, so I make all my own steel and keep everything in house.” Maker: Rob Wayman Knives (SharpByCoop image)
Shining Blades: From the Aldo and Edda Lorenzi Collection
Authors: Aldo and Edda Lorenzi Format: Hardcover, 9 x 9.75 inches Pages: 344, including 280 in color Publication date: May 27, 2025 Publisher: Silvana Editoriale Content: BLADE Magazine Cutlery Hall-of-Fame® members, the authors operated the G. Lorenzi retail knife shop in Milan, Italy, from 1959 to 2014. To stock their store and to add to their collection, they traveled far and wide in search of all manner of knives, scissors, razors, corkscrews and other edged tools. They acquired over 2,000 pieces from the Etruscan period to the present, many incredible specimens of which are illustrated in their book—including those by some of the most famous custom knifemakers of all time—along with the stories of how the Lorenzis obtained the pieces, met the makers and much more. A must read for true knife and edged tool aficionados, both present and future alike. List price: $50 Order: artbooks.com
Bear & Son Cutlery Lawman
Bear & Son Cutlery Lawman Knife type: EDC folder Blade length: 3.25” Blade material: D2 tool steel Rockwell hardness: 59-61 HRC Blade grind: Taper Blade finish: Polished Blade opener: Thumb stud Pivot: Ball-bearing washers Scales: White smooth bone Bolsters: Carbon fiber Lock: Slidelock Pocket clip: Blade tip up Weight: 3.5 ozs. Closed length: 4 3/8” City & state of origin: Jacksonville, Alabama MSRP: $119.99 Company: Bear & Son Cutlery
APOC Wallace Bowie
Designer: Mike Wallace Blade length: 9 5/8” Blade material: D2 tool steel Blade thickness @guard & tip: .256” & .039” Blade finish: Titanium coat Slabs: G-10 Knife to know: Handle screws accept a size T9 Torx or star bit; any other bit used may strip the screws Weight: 1 lb., 5 ozs. Overall length: 15 1/8” Sheath: Kydex, vertical or horizontal carry, MOLLE compatible Country of origin: China MSRP: $117 Company: APOC
CIVIVI Clingman
Designer: Taylor Martin Knife type: Flipper folder Blade length: 2.99” Blade steel: Nitro-V stainless Rockwell hardness: 58-60 HRC Blade grind: Hollow Blade @thickest: .12” Blade finish: Black stonewashed Pivot: Caged ceramic ball bearings Lock: Linerlock Scales: Black G-10 Handle @thickest: .47” Liners: Stainless steel Pocket clip: 6Al4V titanium; ambidextrous, tip up Weight: 2.8 ozs. Country of origin: China MSRP: $71.70 Company: CIVIVI
Boker Plus LRF G10
Knife type: Flipper folder Designer: Japanese knifemaker Kansei Matsuno Blade length: 3.07” Blade steel: VG-10 stainless Blade @thickest: .075” Pivot: Ball bearings Scales: G-10 Lock: Linerlock Weight: 1.94 ozs. Closed length: 4” Continent of origin: Asia MSRP: $108.69 at press-time exchange rate Company: Boker Plus
Jack Wolf Knives The Benny Fat Carbon Arctic Storm
Knife type: Slipjoint Pattern: Lanny’s Clip Blade length: 3.25” Blade steel: CPM S90V stainless Rockwell hardness: 60-61 HRC Blade grind: Hollow Blade finish: Belt satin Blade @thickest: .12” Lock: Framelock/bolster lock Pivot: Ceramic bearings Scales: Fat Carbon Arctic Storm Bolsters: 6Al/4V dark-blasted titanium Pocket clip: Titanium anodized a light blue Knife to know: A pocket-clip recess plug provides clipless carry option Weight: 3.5 ozs. Country of origin: China MSRP: $279.99 Company: Jack Wolf Knives
Go inside linerlocks to judge its operation and workmanship.
For those who truly appreciate the custom knife, particularly the variety of folders, there is beauty in the function as well as the aesthetic qualities of the piece. Nowhere is that functional beauty more evident than in the intricacies, tolerances and precision of a well-made linerlock.
Inspecting the inner workings of the linerlock presents an opportunity to evaluate its operation and determine the degree of expertise that has gone into the finished product. In assessing what goes into the best of linerlock construction, top makers agree that the critical connection between spring and blade is the most obvious indicator of a particular lock’s capabilities. To be sure, there are other aspects to consider in the evaluation of the well-constructed linerlock, and these should never be discounted. But first things first.
Blade-Spring Relationship
“There is more to proper linerlock construction than just the blade-spring relationship,” agreed Ethan Kolar, a custom maker since 2020 with about 65 percent of his work devoted to the linerlock. “There’s a lot of small things that work together to make the knife function as it should, but the blade-spring-lock relationship is the most crucial part of the knife’s functionality as it is critical to a safe and user-friendly knife.”
Ethan Kolar uses an unusual material for the liners of his Persian Style Linerlock—15N20 nickel-alloy steel—and stipples it to boot. “It’s a good, springy material and has good wear resistance allowing the lock to have a longer life before maintenance needs to be done or the lock needs to be extended,” he wrote. Ethan opts for a smaller spring (middle panel, top) on his Persian model. (SharpByCoop image)
When Maverik Murdock watches his linerlock work, blade and spring functionality is his primary concern as well.
“The lock fit is probably the first noticeable portion of a well-made linerlock folder, but it is a small part of what makes an overall good knife,” he explained. “The lock fit, or timing, is a good thing to look for as a sign of attention to detail from a folder maker, though there is some personal preference on how the lock fits.”
Murdock has been making custom knives for 15 years and folders for the last five with about 60 percent of his current output in linerlocks.
“Other good signs of a well-made linerlock are good fit and finish with the materials used,” he observed. “The blade should be centered between the liners when closed. This is a sign of proper pivot construction, good bearings or bushings and good alignment of the liner, back spacer and blade. Smooth travel when opening and closing the blade is also good.”
Repercussions Of A Bad Relationship
The Boomslang linerlock folder by K.C. Gray boasts a 4-inch blade of CuMai copper damascus by Baker Forge & Tool, mammoth molar scales, zirconium furniture and hidden hardware. Closed length: 5 inches. Gray’s price for a similar knife: $2,500. (SharpByCoop knife image)
In the event the linerlock fails the first critical test and the function is flawed, there are consequences.
“If the lockup engagement isn’t correct, it will do one of two things in my experience,” Maverik began. “If there isn’t enough engagement, it could create an unsafe and unstable lock as there isn’t enough lock contacting the blade, which will run the risk of the blade coming back on the user’s hand. On the other end of the spectrum, too much lock engagement can crowd the user’s thumb or thumbnail, making it difficult to release the lock and decrease its service life as the lock has less area to wear into before it has sloppy lock engagement. The most common types of incorrect lock interfaces, I would say, are the two I’ve listed. However, in my opinion, over-engagement is more common than under-engagement as it is easy to both grind more material than is needed for proper lock engagement and the blade taper angle can be easily canted less than is necessary.”
If the spring extends beyond the optimal position, the condition is commonly described as “overtravel,” and the knife’s function is significantly impaired as time and use progress.
“If the lock bar has overtravel or over engagement, it generally isn’t dangerous to begin with because the angle change on the lock bar isn’t high enough to compromise the compression strength of the lock under normal working conditions,” Murdock explained. “But that does depend on the construction of the knife and materials used. Overtravel generally just means a shortened working life of the lock mechanism where it would need to be replaced sooner than a properly timed lock. The problems with overtravel begin to show up with the reach to the far side of the lock. If the lock bar fully reaches the other side of the lock, there comes a point where it no longer has contact with the blade when open, or has minimal pressure where it can bind.”
Other Linerlock Concerns
Marverik Murdock’s Steadfast has a 3.5-inch blade in a san-mai construction of CPM 154 stainless steel and CPM 3V carbon steel. The scales are Fatcarbon® space coral and the bolsters are feather damascus. Closed length: 4.25 inches. His price for a similar knife: $3,200.
K.C. Gray has been making custom knives for a decade and collecting them for 30 years. He produces about 100 knives per year and roughly half are linerlocks. His perspective on quality workmanship includes the vital connection between spring and blade as well as other factors.
Interface
“That interface is the prime concern,” Gray observed, “and people usually talk about it in terms of ‘percent of lockup.’ Basically, that is how much the lockbar travels across the lock face toward the opposite liner. Everybody has their own idea of the ideal number. Some like as little as 10 percent lockup. I think most makers would say 40 to 50 percent would be the correct range. Too little lockup and the blade can slip off the lockbar and close. Too much and the lock will stick or even light wear will cause the blade to wiggle. So getting the lockup in the sweet spot in the middle is a sure sign the knife was well constructed.”
Detent
According to K.C., other critical elements should be considered in the overall quality of a particular linerlock.
“Other things to look for would be the strength of the detent holding the blade in the closed position,” he advised. “It should be firm enough that the blade doesn’t fall open when lightly shaken. But it can also be a problem if the detent is too strong. If it’s very strong it can make opening awkward and dangerous. Thumbs can slip onto the cutting edge or the knife can be dropped more easily. Another thing to look for is the centering of the blade between the liners. It should be bang down the middle except in chisel-ground blades.
Clearance
“Something else,” Gray continued, “is whether there is enough clearance between the liners for the thumb to get purchase on the lock to disengage it. If the blade is thick, often no relief is needed. But a thinner blade will usually need some relief cut into the opposite liner. It’s usually a sign that the maker thought the design through thoroughly.”
Other Aspects To Look For In Linerlocks
Viewed straight on two-dimensionally, some folders scream linerlock while others do not. The linerlock folding dagger by Brian Nadeau with dragon engraving by Vitalij Quaranta fits the latter category. (SharpByCoop image)
Of course, there are attributes to the well-made linerlock that are not necessarily visible. The feel in the hand and the ease of simple repetition in opening and closing contribute to the best linerlock experience.
“The blade motion when opening and closing should be smooth and consistent through the whole opening/closing cycle,” Murdock related. “Some makers like more or less drag on the blade, but it should be consistent. If the drag is excessive, it can be a sign of improper pivot sizing or too much lock bar pressure. The blade should have little or no side play when open. If it does the pivot may not be tight enough or the working surfaces may not be in alignment. The blade should be centered when closed and should be tight against the stop pin with a firm enough detent to prevent accidental deployment.”
Kolar also acknowledges the telltale signs of poor construction that are not necessarily readily apparent on sight and warns prospective buyers to consider these red flags.
“There are a few limited signs of improper construction that can’t be seen by the eye,” he commented. “Sloppy blade lockup oftentimes is very difficult to see as it doesn’t take very much for the blade to rock against the lock. How tight the blade pivots is another, as well as whether it has side play in the blade, and this is something that you can usually only feel. A good simple rule for cases such as these from both the maker and the buyer standpoint is to go with your gut on what you feel. A lock should lock up tight with no horizontal side play and no vertical lock play relative to spring size. Smaller springs can compress easier than larger.”
Questions To Ask When Buying A Linerlock
As K.C. Gray observed, the “percent of lockup” refers to how much the spring/lockbar travels across the lock face toward the opposite liner. “I think most makers would say 40 to 50 percent would be the correct range,” he opined. Brian Nadeau appears to achieve that range (far right, middle panel, top) with his dragon-themed linerlock. (SharpByCoop image)
When buyer and seller meet, the evaluation of a prospective linerlock should include more than just a consideration of the knife itself. Buyers should engage the maker in conversation and ask a few questions. A healthy dialogue always enhances the experience and gives the customer confidence in the decision to plunk down hard-earned money.
“Ask about the liner material,” Gray offered. “It’s almost always titanium in custom knives. Ask what angle the lock face has been ground to. Most often seven to nine degrees is used. Ask if the blade runs on bearings or washers. And just ask if the maker can explain the materials used and why he or she likes those materials.”
Murdock agrees. “If you are talking to a maker about his work, he should know the process and materials used and should be confident in what he does. It’s good to ask about the materials and why they’re used. If you can see the work in person and look at these points and the fit and finish, that’s a great place to start.”
The making of a quality linerlock requires attention to detail and presents challenges that go well beyond a simple aesthetic. While eye appeal is always a factor, the proof of the linerlock’s worth is in its operation. Informed buyers can help themselves in taking the time to understand the attributes of linerlock mechanics and the skill that is present in the finished product. Then, the unbeatable combination of beauty and optimal use can be attained.
With its first foray into knifemaking, Work Sharp cooks up a doozie–a knife that’s both a folder and an automatic.
Work Sharp has five decades of experience keeping the knife world as sharp as ever. At that time, the tool and knife sharpening implements company had never dipped its toe into knifemaking—until now.
At the 2025 BLADE Show, the Ashland, Ore., company will debut its first foray into edged tools with the introduction of the RMX EDC-style knife. And while the pocket partner might seem like just another folder at first blush, the knife’s internals make it an innovative addition to nearly anyone’s collection. Work Sharp isn’t lying when it says the RMX is “Your knife. Your Way.”
Manual Or Auto
The groundbreaking aspect of the RMX (Replaceable Mechanism Exchange) is that the knife is both an auto and a manual action. And no, it’s not just manual by muscling open an auto or flicking open a manual.
As its name suggests, the RMX utilizes what Work Sharp claims is the first-ever interchangeable pivot cartridge. Essentially, the knife comes with two pivots—one ball bearing (manual) and one spring-loaded (auto). Simply switch one out for the other via a 2mm hex head.
Furthermore, internally, the tension is adjustable thus, the deployment of the blade in both manual and auto configurations is tunable. It’s a slick system, not only because of the implications of having two knives in one, but also legally.
Theoretically, the RMX should make shipping the sometimes automatic knife all the simpler, while also giving users more control over exactly what they’re carrying. Not to mention, it’s a plain and simple concept.
As for deployment, a push-button near the pivot kicks the blade out as an auto and acts as the release as well.
RMX Blades
The Work Sharp RMX comes in two blade styles and three sizes. The one I’ve seen making the most headlines is the full-sized 3.2-inch Reverse Tanto profile—a wicked-looking blade with an ultra-thin edge and excellent slicing properties. The company is also offering a drop-point profile in two sizes, 3.2 inches and a compact 2.4-inch option. Both come with a saber grind.
As for blade material, Work Sharp utilized Crucible Industries’ CPM 3V steel. This is a solid choice, given the metal is known for its toughness, high wear resistance and ability to hold a very fine edge.
RMX Handle
Interestingly, especially for a knife with auto guts, the RMX is feather light, thanks mainly to its handle. Work Sharp opted for magnesium, keeping the knife between 2.24 ounces and 2.7 ounces, depending on its configuration. Additionally, the material imparts a good deal of stiffness to the knives and, with a gray Cerakote treatment, proves plenty durable, not to mention eye-catching.
Complete Package
Even for the sheer novelty, the Work Sharp RMX is an intriguing system made even more so due to an affordable price. The RMX compact has an MSRP of $130 and the full-sized version an MSRP of $140, making the line competitive in both the folder and auto markets—very competitive. Overall, the offering makes one wonder why it took Work Sharp so long to take a stab at knife manufacturing.
