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    • Shark Lock

    Shark-Lock Knives: A Patented Lock Built for a Lifetime of Daily Carry

    The Shark-Lock is Andrew Demko’s patented sliding folder locking mechanism, built as a stand-alone lock bar that rides the spine between the handle scales rather than flexing off a liner or frame. A dorsal-fin-shaped tab sits above the blade tang, held forward against a hardened stop pin by a captured drive spring, with no ball detent required to keep the blade closed at rest. To open the knife, the user slides the fin rearward and upward, releasing the lock bar so the blade swings free; releasing the fin lets spring tension return it to the locked position. Demko builds the Shark-Lock exclusively across the Razor-Shark, Shark Cub, and Nano Shark platforms, and since the mechanism is patented, no other manufacturer produces a true Shark-Lock folder.

    At Knifeworks, you are buying from an authorized Demko Knives dealer: every Shark-Lock folder on this page ships with full manufacturer warranty coverage and sourcing directly through Demko’s dealer network. No gray-market imports, no voided warranties.

    The Shark-Lock delivers a specific practical advantage over Liner Locks and Frame Locks: its geometry is self-adjusting. As contact surfaces between the lock bar and stop pin wear from years of use, the mechanism compensates instead of developing the blade play that eventually shows up in a worn Liner Lock or Frame Lock. The lock bar sits centered on the spine rather than machined into one handle scale, so operation is the same in either hand. Available in CPM Cru-Wear, CPM-S35VN, CPM 3V, and 20CV across three sizes, the Shark-Lock lineup covers everything from full-size EDC to deep-concealment backup carry.

    Why the Shark-Lock holds up differently over timeMost lockbacks and Liner Locks rely on spring tension against a single wear point that can loosen into blade play after years of daily deployment. Andrew Demko designed the Shark-Lock’s lock bar to seat against a hardened stop pin whose geometry self-adjusts as it wears, so the lock stays tight instead of loosening. For a folder that gets opened and closed daily for a decade or more, that self-adjusting geometry is the deliberate advantage.

    Call 888-225-9775 — our team can help you choose the right Shark-Lock knife for your carry.

    Lock type
    Shark-Lock
    Handle material
    G10 / Titanium
    Pioneered
    Andrew Demko
     
    Strength
    Very High
    Ambidextrous
    Yes
    Best use
    Hard-Use EDC
    Compare Selected
    What is a Shark-Lock?+

    The Shark-Lock is Andrew Demko’s patented folding knife locking mechanism: a stand-alone lock bar that rides along the spine between the handle scales, held forward against a hardened stop pin by a captured drive spring. It is used exclusively on Demko Knives’ Razor-Shark, Shark Cub, and Nano Shark platforms.

    How does the Shark-Lock mechanism work?+

    A dorsal-fin-shaped tab sits above the blade tang along the spine. Sliding the fin rearward and upward disengages the lock bar so the blade swings free; releasing the fin lets spring tension return the lock bar forward into the locked position against the stop pin.

    How is a Shark-Lock different from a Liner Lock or Frame Lock?+

    A Liner Lock and Frame Lock both use a side-flexing bar, cut from a steel liner or the handle scale itself, that drops behind the blade tang. The Shark-Lock uses a separate, spine-mounted lock bar rather than flexing any part of the handle scale, and its geometry self-adjusts for wear instead of developing the blade play that a worn Liner Lock or Frame Lock can develop over years of use.

    Is the Shark-Lock stronger than a Liner Lock or Frame Lock?+

    The Shark-Lock is built to self-adjust as its contact surfaces wear, where a Liner Lock or Frame Lock can develop blade play over years of use. Its stand-alone design also means it is not relying on a thin liner or frame section to carry the load.

    Is the Shark-Lock ambidextrous?+

    Yes. Because the lock bar and its release fin sit centered along the spine rather than on one handle scale, the Shark-Lock operates the same way in either hand.

    What steel is best for a Shark-Lock knife?+

    CPM-S35VN is the easiest all-around choice for daily carry. Buyers who want maximum toughness for hard use should choose CPM Cru-Wear or CPM 3V, and buyers who want the longest edge life between sharpenings should choose 20CV.

    What size Shark-Lock knife should I buy for EDC?+

    The Shark Cub is the mid-size option most EDC buyers land on: full Shark-Lock mechanism, a blade length suited to daily tasks, and a handle that is not too large for pocket carry. Buyers who prioritize a slimmer profile should look at the Nano Shark, and buyers who want the largest blade and grip should look at the full-size Razor-Shark.

    Does Knifeworks carry the full Demko Shark-Lock lineup?+

    Yes. Knifeworks is an authorized Demko Knives dealer carrying the Razor-Shark, Shark Cub, and Nano Shark across their available steel options. Call 888-225-9775 and our team can confirm current stock on any specific model.

    Shark-Lock models: production lineup at Knifeworks

    ModelSizeSteel OptionsOriginTier
    Demko Razor-Shark ★Full-sizeCPM Cru-Wear / CPM 3V / 20CVUSAPremium
    Demko Shark CubMid-sizeCPM-S35VN / CPM Cru-WearUSAPremium
    Demko Nano SharkCompactCPM-S35VNUSAPremium
    ️
    Authorized dealer
    Every Shark-Lock knife ships with full Demko Knives manufacturer warranty coverage.
    Same-day shipping
    Ships from Columbia, Louisiana — 888-225-9775
    Three models in Shark-Lock
    Razor-Shark, Shark Cub, Nano Shark — Demko’s patented mechanism, USA made.
    Call us before you buy
    888-225-9775 — we carry these knives daily.