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Demko AD20
The Demko AD20 is where the Shark Lock made its debut — and it remains the flagship of the entire Demko lineup. This is the knife that introduced the mechanism now found across the AD20.5, Shark Cub, and Nano Shark, but the AD20 itself occupies a different tier. Every model in this category is an MG — machine ground and made in the USA — separating these from the Taiwan-produced models elsewhere in the Demko catalog.
The Shark Lock operates from a spring-loaded fin on the spine. When the blade is open, the fin sits flush and serves as a thumb ramp, reinforcing grip during heavy cutting. To close, the user pushes the fin forward, disengaging the lock and allowing the blade to drop shut cleanly. It's a one-hand mechanism designed around natural hand mechanics — strong lockup under load, intuitive release without repositioning the grip.
Blade steel across the MG AD20 line includes CPM Cru-Wear, a semi-stainless tool steel that balances toughness and edge retention for hard-use applications. Cru-Wear holds up well under impact and lateral stress, making it a strong match for a knife built to handle demanding cutting tasks rather than sit in a display case. Blade configurations include the Clip Point and Shark Foot, with slotted variants available in both profiles.
Handle options split between G-10 and titanium. The G-10 models come in a wide range of colorways at the $450 tier, while smooth and milled titanium scales move into the $650 range — adding a premium in-hand feel without changing the core geometry. Across all variants, the AD20 fills the hand with authority and carries the kind of mass that inspires confidence during extended use.