Tenable Fenrir T1034F7 Blackwash 14C28N Blade Jade G10 Handle Button Lock Folding Knife

Designed by Greg Schob, a skilled metalworker and custom knife maker, the Fenrir combines striking aesthetics with practical everyday functionality. This folding knife features a Sandvik 14C28N harpoon-style blade with a generous belly, delivering excellent control for slicing, piercing, and general cutting tasks. The blade's sharp, slicey edge handles everything from self-defense to food preparation with ease.

The Fenrir's ergonomic Jade G10 handle features chamfered edges and a unique bolster design that centers weight in your palm for superior control and a secure grip. The innovative fidgety button lock mechanism provides smooth, satisfying deployment—press to disengage and enjoy both practical functionality and tactile enjoyment. Multiple deployment options, including thumb studs, offer flexibility in how you open the blade.

The reversible deep carry pocket clip enables discreet carry while maintaining quick accessibility. Customize your carry preference for left or right-handed use. Whether you're a serious EDC enthusiast or appreciate quality craftsmanship, the Fenrir delivers versatile performance and engaging design that makes it a pleasure to handle and carry daily.

SPECIFICATIONS

Overall Length	7.93''/201.3mm
Blade Length	3.45''/87.6mm
Blade Thickness	0.138‘‘/3.5mm
Blade Material	Blackwash 14C28N
Blade Style	harpoon blade
Blade Grind	Flat Grind
Blade Finish	Blackwash
Handle Material	Jade G10 with Purple Undead Print
Color	Purple
Lock Type	Button Lock
Weight	4.23oz/120g
Model Name	Fenrir
Model Number	T1034F7
Designer	Sparrow Knife

Tenable Fenrir T1034F7 — 14C28N Harpoon Button Lock Folder

The Tenable Fenrir T1034F7 is a button lock folder drawn by Sparrow Knife Co and built around a harpoon blade you can actually use. The 3.45 in blade runs Sandvik 14C28N at 59-61 HRC in a blackwash finish, with a generous belly for slicing and a swage behind the tip that adds a thumb index and a lot of pierce for its size. The Jade G10 with Purple Undead Print handle has chamfered edges and centres the weight in your palm, and the button lock presses open and closed one-handed with your fingers clear of the edge. It sits in the Tenable Fenrir line alongside our folding knives and best sellers.

Sandvik 14C28N and a Button Lock, Explained

The Fenrir's blade steel is doing quiet work. 14C28N is nitrogen-alloyed, which is why it resists staining like a much more expensive stainless while still taking a very fine edge - and why it will not chip out if you catch a staple in a box. It sacrifices some raw wear resistance to D2 in exchange for that toughness and for edge maintenance measured in minutes instead of hours. The button lock is the other half of the argument: it is fully ambidextrous and it keeps your fingers out of the blade path every single time you close the knife, which over a decade of daily folding knife use is worth more than any spec sheet number.

Why the Fenrir Belongs in Your Pocket

• Sandvik 14C28N at 59-61 HRC: excellent stain resistance plus an edge that will not chip on you.
• Harpoon blade with a swage notch behind the tip - pierces well, indexes the thumb, and looks like it means it.
• Button lock action: press to release, the blade falls shut, and your fingers never cross the edge.
• Jade G10 with Purple Undead Print handle with chamfered edges and a bolster design that centres weight in the palm.
• 3.5 mm blade stock and a 7.93 in overall frame at 4.23 oz - substantial without being heavy.
• Twin thumb studs for a reliable one-handed roll-open, plus enough detent to stay shut in a pocket.
• Reversible deep carry clip: rides low and swaps sides for left- or right-handed carry.
• Sparrow Knife Co's mechanical look - this is a knife that reads as a tool, not a prop.

Best Uses for the Fenrir

• Everyday carry - 4.23 oz with a low-ride clip disappears along the pocket seam.
• Breaking down boxes and cutting rope, where the 14C28N edge holds up and resharpens fast.
• Camping and hiking: a harpoon tip handles food packaging, cordage and tinder without fuss.
• Workshop and garage tasks where one reliable open and a tough blade are the whole requirement.
• EDC fans who want a button lock they can open and close all day without looking.

Frequently Asked Questions

Is the Fenrir a flipper or a thumb stud knife?
Thumb studs with a smooth detent and a button release. There is no flipper tab, and nothing protrudes from the spine when closed.

How does 14C28N compare to the D2 in the Kansept Fenrir fixed blades?
14C28N is fully stainless and much easier to sharpen; D2 holds an edge longer but is only stain resistant. Which is better depends entirely on whether you will wipe the blade down.

Can I close the button lock one-handed?
Yes - press the button and the blade drops away from your fingers. That is the main practical advantage of a button lock over a liner lock.

Does the jade G10 undead print wear off?
No. The graphic is sealed under the resin surface of the G10 laminate, so it cannot rub or flake away. It will only dull slightly with heavy abrasion.

Is this knife legal to carry where I live?
Folding-knife laws vary widely by country, state and city. Check your local regulations before carrying.

Sandvik 14C28N vs. Common Pocket Knife Steels

Steel	Typical HRC	Edge Retention	Corrosion Resistance	Toughness	Sharpening Ease
14C28N (this knife)	59-61	Good	Excellent	Good	Very Easy
Nitro-V	59-61	Good	Very Good	Better	Easy
154CM	58-61	Good	Good	Very Good	Moderate
CPM-S35VN	58-60	Very Good	Very Good	Better	Moderate
D2 Tool Steel	58-61	Very Good	Fair	Good	Moderate
8Cr13MoV	57-59	Fair	Good	Good	Very Easy

Sandvik 14C28N is a nitrogen-alloyed martensitic stainless that lands at 59-61 HRC in production heat treats. It gives up a little raw wear resistance to D2 and CPM-S35VN in exchange for corrosion resistance and edge stability that is almost impossible to chip. HRC figures are typical mill ranges, not a guarantee for any single blade.

Glossary of Key Terms

Sparrow Knife Co
The designer behind Tenable's Fenrir series: an angular, mechanical look with chamfered handle edges and a bolsters-and-spacers build.

Sandvik 14C28N
A nitrogen-alloyed martensitic stainless at 59-61 HRC. Excellent stain resistance, a fine stable edge and very easy sharpening - ideal for a hard-working daily carry.

Harpoon Blade
A profile with a swage notch cut behind the tip. It reduces drag on the pierce, adds a thumb index point and gives the blade an aggressive silhouette.

Button Lock
A spring-loaded push button in the handle that releases the blade tang: ambidextrous, fidget-friendly and one of the safest one-hand closes available.

Blackwash Finish
A dark tumble-and-etch treatment that reads near-black at a glance, killing glare and hiding carry scratches far better than satin.

Jade G10 with Undead Print
A printed graphic sheet sealed into translucent jade G10: eyeballs and tentacles in purple, sealed under resin so the artwork cannot rub off.

Thumb Studs
Twin studs either side of the blade that let you break the detent and roll the blade open with your thumb, one-handed.

Ceramic Ball Bearings
Hard, friction-free pivot bearings that keep the blade centred and give a fast, glassy opening that stays consistent in dust and humidity.

Who Should Buy the Fenrir

• You want a button lock folder for fast, controlled one-handed use.
• You carry daily and want an edge that resharpens in minutes rather than an hour.
• You like harpoon geometry and want a usable version of it rather than a display piece.
• You want a 4.23 oz folder that still feels substantial in the hand.
• You appreciate graphic G10 that will not rub off in a pocket.

Who Should Skip It

• You need maximum edge retention and are prepared to sharpen on diamond - buy D2 or CPM-20CV instead.
• You insist on a flipper tab and ceramic bearings.
• You want a sub-3 oz ultralight: at 4.23 oz the Fenrir is a full-hand knife.
• You dislike patterned or graphic scales and want plain black.
• You need a fixed blade for hard outdoor work; the Fenrir is a folding EDC.

Care & Maintenance

• Wipe the blade dry after every use; 14C28N is strongly stainless but pocket sweat still speckles bare steel over weeks.
• One drop of quality knife oil at the pivot monthly, then cycle the button lock so oil spreads across the tang.
• Blow pocket lint out of the handle channel before oiling so grit never grinds against the pivot washers.
• Sharpen on a 1000-grit water stone or diamond plate; 14C28N grinds fast and takes a keen edge in a handful of passes.
• Finish on a loaded leather strop with light pressure - heavy passes round the apex and undo the edge you just set.
• Wipe anodised aluminium scales with a damp cloth only; solvents and abrasive polish dull the oxide colour.
• Never pry, twist or use the tip as a screwdriver; side loads snap tips far faster than cutting ever will.
• Check the pocket clip screws every month or two with the correct Torx driver so the knife never rides loose.
• Store the knife closed and dry, never in a damp leather pouch that holds moisture against the steel.