Bestech SENU BT2601D CPM-S90V Blade Titanium Handle Frame Lock Folding Knife

The Bestech SENU BT2601D features a CPM-S90V blade, a premium martensitic stainless steel celebrated for exceptional wear resistance and edge retention from its high vanadium carbide content. This advanced steel demands specialized sharpening tools but delivers unmatched cutting performance. The titanium frame with camo carbon inlays and black PVD finish provides durability and elegance. Multiple deployment options—flipper, front flipper, and thumb hole—offer versatile carry and access. At 108g with ceramic ball bearings, it balances lightweight efficiency with smooth operation. The frame lock ensures secure blade control. Designed by Grzegorz Grabarski, this 3.48" blade knife excels for precision cutting tasks where edge retention matters most, though heavy impacts should be avoided due to the carbide-dense steel's reduced toughness.

CPM-S90V Blade Introduction

CPM-S90V is a premium, high-alloy martensitic stainless steel renowned for its exceptional wear resistance and unparalleled edge retention, owing to a high volume of hard vanadium carbides. However, this extreme wear resistance makes it notoriously difficult to sharpen and machine, requiring specialized abrasive tools like diamond or cubic boron nitride. Additionally, while highly corrosion-resistant due to its chromium content, its high carbide density reduces its overall toughness, making it susceptible to chipping if subjected to heavy impacts or prying tasks.

SPECIFICATIONS

Blade Material: S90V
Blade Finish: Black PVD
Handle Material: Titanium with Camo Carbon Inlays

Handle Color: Black PVD
Locking Mechanism: Frame Lock
Deployment: Flipper, Front Flipper and Thumb Hole

Overall Length: 7.96" / 202.3 mm
Closed Length: 4.48" / 113.9 mm
Blade Length: 3.48" / 88.4 mm

Blade Thickness: 0.13" / 3.3 mm
Blade Hardness: 60 - 62 HRC
Pivot: Black PVD Stainless Steel

Clip: Titanium
Backspacer: Titanium
Ball Bearing: Ceramic
Knife Weight: 108g
Designer: Grzegorz Grabarski

Bestech SENU BT2601D - CPM-S90V Titanium Frame Lock Folder

The Bestech SENU BT2601D is a premium frame lock folder by designer Grzegorz Grabarski, built around a black pvd CPM-S90V blade and a bestech-senu-bt2601d handle. With flipper, front flipper and thumb-hole deployment, it is a flagship in the Bestech knives line. Explore more CPM-S90V knives at EDCMALL.

CPM-S90V Blade Steel

CPM-S90V is a high-vanadium powder metallurgy stainless that holds an edge longer than almost anything in its class. The black pvd 3.48-inch blade on the SENU BT2601D is matched to a ceramic bearing pivot and a solid titanium frame lock. Compare it to CPM-S90V and M390 folders in our premium knives range.

Why the SENU Belongs in Your Pocket

• CPM-S90V blade steel for elite edge retention and wear resistance.
• Titanium frame lock with carbon fiber inlay for strength and visual contrast.
• Three deployment methods: flipper tab, front flipper and thumb hole.
• Ceramic ball bearing pivot for fast, glassy opening.
• 3.48 in blade and 7.96 in overall length for full-size EDC performance.
• Weighs only 3.81 oz / 108 g despite the premium full-size build.
• Titanium pocket clip and backspacer to match the frame.
• Grzegorz Grabarski design with refined lines and premium materials.

Best Uses for the SENU

• Executive or gentleman's EDC where edge retention matters.
• Collector rotation as a high-end S90V frame lock.
• Daily cardboard, package and rope cutting for users who hate sharpening.
• Camping and hiking food prep and camp tasks.
• Gift for a serious knife enthusiast who values advanced steels.

Frequently Asked Questions

Is CPM-S90V hard to sharpen?
Yes. Its dense vanadium carbides require diamond plates or high-quality ceramic stones, but the edge lasts a very long time.

What is the difference between SENU C and D?
C has a horizontal satin hand-polished blade, Fat Carbon inlay and bronze handle. D has a black PVD blade, camo carbon inlays and black PVD finish.

Can the clip be moved?
The titanium clip is fixed to one side for tip-up right-hand carry.

Is the SENU worth the premium over S35VN knives?
If you prioritise edge retention and wear resistance and do not mind slower sharpening, S90V is a measurable step up.

CPM-S90V vs. Common Premium Pocket Knife Steels

Steel	Typical HRC	Edge Retention	Corrosion Resistance	Toughness	Sharpening Ease
CPM-S90V (this knife)	60-63	Excellent	Excellent	Fair	Difficult
CPM-S35VN	58-60	Very Good	Very Good	Better	Moderate
M390	60-62	Excellent	Excellent	Good	Difficult
CPM-20CV	59-61	Excellent	Excellent	Fair	Difficult
CPM-154	60-61	Very Good	Good	Good	Moderate
154CM	58-61	Good	Good	Very Good	Moderate
D2 Tool Steel	58-61	Very Good	Fair	Good	Moderate

CPM-S90V is Crucible's high-vanadium powder metallurgy stainless. The dense vanadium carbides give it elite wear resistance and edge retention, but the same carbides make it slower to sharpen and less forgiving of impacts than tougher steels. It is the right choice when cutting miles, not prying, is the job. HRC figures are typical mill ranges.

Glossary of Key Terms

Bestech Knives
A Chinese production knife brand working with global designers to deliver mid-to-premium folders with advanced steels and tight tolerances.

Grzegorz Grabarski
The Polish designer behind the SENU - a titanium frame-lock folder built around long edge retention and clean lines.

CPM-S90V
Crucible's high-vanadium powder metallurgy stainless. Dense vanadium carbides give elite wear resistance and edge retention at the cost of slower sharpening.

Frame Lock
A lock cut directly into the handle's titanium slab; the frame itself springs behind the blade tang. Fewer parts than a liner lock, and stronger because the whole handle is the lock.

Fat Carbon
A layered carbon-fiber and resin composite with metallic or coloured veining; light, rigid and visually striking.

Camo Carbon Fiber
A multi-layer carbon fiber with a camouflage weave pattern, sealed under resin for durability.

PVD Coating
Physical vapour deposition: a hard ceramic layer bonded to the blade in vacuum for corrosion resistance and a black tactical look.

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

Front Flipper
A small tab on the blade's spine that lets you flick the blade open with the index finger from the top, complementing the standard flipper.

Who Should Buy the SENU

• Knife enthusiasts who want maximum edge retention from CPM-S90V.
• Collectors seeking a Grzegorz Grabarski design in premium materials.
• Users who dislike frequent sharpening and want a long-lasting working edge.
• Titanium frame-lock fans who appreciate carbon fiber inlay contrast.
• Anyone looking for a full-size EDC folder under 4 oz.

Who Should Skip It

• Users who want an easy-to-sharpen steel; S90V needs diamond abrasives.
• Those who use their knives for prying or impact work; S90V can chip.
• Budget buyers; the SENU is priced for premium materials and steel.
• People who need a left-hand or fully ambidextrous lock.
• Users who prefer lightweight plastic or G10 handles over titanium.

Care & Maintenance

• Wipe the blade dry after every use; S90V is strongly stainless but pocket sweat still marks bare steel over time.
• Oil the pivot and frame-lock face monthly with a quality knife oil, then cycle the blade to spread it.
• Sharpen on a diamond plate or quality water stone; S90V's dense vanadium carbides defeat ordinary stones.
• Finish on a fine ceramic rod or loaded leather strop with light pressure - heavy passes round the apex.
• Blow pocket lint out of the handle channel and lock recess before oiling so grit never grinds the pivot.
• Wipe anodized or PVD-coated titanium scales with a damp cloth only; abrasive polish dulls the finish.
• Clean the pocket clip and its screws with a soft brush; re-torque them every month or two.
• Never pry, twist or use the tip as a screwdriver; S90V's hardness chips under lateral load.
• Store the knife closed and dry in a pouch or drawer, away from damp leather.