Bestech DUCI BT2605B CPM-20CV Blade Titanium Handle Frame Lock Folding Knives

Bestech DUCI BT2605B - Product Overview

The Bestech DUCI BT2605B is Polish designer Ostap Hel's take on the compact utility karambit, built by Bestech around one clever idea: a removable titanium finger ring that releases at the push of a button - no tools, no screws. Ring on, it locks into the hand for secure pulling cuts; ring off, it is a streamlined 1.97 in CPM-20CV folder for the pocket. The flipper opens on ceramic ball bearings, a titanium frame lock holds the modified spear point blade solid, and a milled titanium clip carries tip-up right. At roughly 54 g, it is one of the most compact premium folders we stock - see the whole Bestech DUCI series or compare other frame lock knives and folding knives.

Browse more Bestech knives, shop the full EDC lineup or our best sellers for proven picks.

CPM-20CV Steel Selling Points

CPM-20CV is Crucible's powder-metallurgy stainless steel in the same class as M390 and 204P: roughly 1.9% carbon and 20% vanadium for a dense field of hard vanadium carbides. What that means in hand is class-leading edge retention - the 1.97 in blade keeps its working edge through weeks of box, cord and packaging duty - plus excellent corrosion resistance despite the high carbide volume. Heat treated to 61-62 HRC, it sacrifices a little toughness and sharpening ease for the longest time-between-touch-ups of any steel Bestech uses. If you hate sharpening, 20CV is the steel to buy.

Core Selling Points

• 1.97 in (50 mm) CPM-20CV modified spear point, flat grind, 61-62 HRC
• Removable titanium finger ring - push-button release, no tools needed
• Flipper opening on ceramic ball bearings for a fast, smooth action
• Integral titanium frame lock rated for hard pulling cuts
• Stonewashed Titanium
• Milled titanium pocket clip, tip-up right carry
• 6.38 in (162 mm) overall with ring, only about 54 g / 2.26 oz
• Ostap Hel design - custom knifemaker lines at a production price

Best Use Scenarios

• Compact daily carry: 4.41 in closed and 54 g - vanishes in a pocket, coin pocket or organizer
• Secure-grip tasks: snap the ring on for confident pulling cuts on cord, packaging and zip ties
• Commuting and travel: sub-2-inch blade suits strict carry rules and office environments
• Karambit fans: ring-on mode recreates the curved-blade retention grip with a straight blade
• Collector piece: Ostap Hel's signature geometry plus flame anodized or carbon fiber options

Frequently Asked Questions

How does the removable ring work?
The titanium ring is held by an integrated push-button release mechanism - press the button and the ring detaches; press it back on and it locks. No tools required.

What is the blade hardness?
61-62 HRC. CPM-20CV is heat treated hard to maximize the vanadium-carbide edge retention the steel is known for.

Is the DUCI a real karambit?
It is karambit-inspired: the removable ring gives karambit-style retention, but the straight modified spear point blade behaves like a standard EDC folder.

How does CPM-20CV compare to S35VN?
20CV holds an edge notably longer and resists corrosion slightly better; S35VN is tougher and easier to sharpen. Choose 20CV for low maintenance, S35VN for hard use.

Does it ship with the ring installed?
Yes - the DUCI arrives with the titanium finger ring installed, and it can be removed or refitted at any time.

CPM-20CV Compared to Other Premium Steels

Ratings are relative within this class of steel, not absolute. Hardness varies by maker and heat-treat protocol.

Glossary of Terms

CPM-20CV
Crucible powder-metallurgy stainless steel (~1.9% C, 20% V, 1% Mo). Outstanding edge retention and corrosion resistance; heat treated to 61-62 HRC.

Modified Spear Point
A symmetrical-looking point with the spine curving into the tip - strong, precise piercing geometry with enough belly for slicing.

Frame Lock
A section of the titanium handle frame springs against the blade tang. Very strong for pulling cuts and easy to disengage one-handed.

Removable Finger Ring
Ostap Hel's signature DUCI feature: a titanium ring at the handle end that releases via push-button so the knife converts between karambit-style and conventional carry.

Ceramic Bearing Pivot
The blade rides on ceramic washers for low friction and corrosion-free smoothness over years of use.

Black PVD Coating
Physical vapor deposition - a hard, thin dark coating bonded to the steel that resists wear far better than paint or Cerakote-style finishes.

Who Should Buy the Bestech DUCI BT2605

Who should buy it

• EDC minimalists who want a premium sub-2-inch folder under 60 g
• Karambit enthusiasts who want a legal-friendly, convertible version
• Ostap Hel collectors completing the DUCI line in every finish
• Buyers who want maximum edge retention and minimum sharpening
• Gift shoppers looking for an unusual, high-quality knife for a man who EDCs

Who should skip it

• Users who need a 3 in+ working blade for camp or field tasks
• Anyone who batons, pries or abuses knives - 20CV at 61-62 HRC is chip-prone under torsion
• Buyers on a budget - the ring mechanism and 20CV put this in premium territory
• People who dislike fiddly mechanisms and prefer a plain stud-opened folder

Care & Maintenance

1. Wipe the blade dry after wet or acidic cutting tasks - PVD and 20CV resist rust but are not immortal.
2. Keep the push-button ring release free of lint: blow it out with compressed air monthly.
3. A single drop of oil on the pivot keeps the ceramic-bearing flipper action crisp.
4. Do not use the 61-62 HRC blade for prying - hard vanadium carbides chip under torsion.
5. Strop the edge to refresh it; 20CV rarely needs a full stone session until months of use.
6. Clean the milled titanium clip and handle channels with a soft brush to clear pocket debris.
7. Check frame lock engagement after any hard use before storing the knife closed.
8. If the flame anodized color fades from handling oils, wipe with isopropyl alcohol on a cloth.
9. Store in a dry place with the lock disengaged for long-term storage.