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Demko AD15
The Demko AD15 represents Andrew Demko's second-generation approach to hard-use folding knives. Where the AD10 established credibility through the Tri-Ad lock, the AD15 introduces an entirely different mechanism — the Scorpion lock — built from the ground up to address what Demko saw as the remaining limitations of traditional back lock designs.
The Scorpion lock operates ambidextrously like a back lock but with a key mechanical advantage: the user's grip actively reinforces lock engagement rather than working against it. As you apply force through the handle during cutting, the lock gets stronger — not weaker. The mechanism also self-adjusts for wear over time, maintaining consistent lockup without the play that develops in many locking folders after extended use. One-hand operation keeps fingers clear of the blade path on both opening and closing.
The AD15 runs a spearpoint blade with a swedge, deployed via dual thumb studs. Blade steel is primarily CPM-20CV, giving the edge strong retention and corrosion resistance for a knife that's built to be used hard and often. The spearpoint profile offers a balanced combination of tip strength and slicing performance — versatile enough for detailed work without sacrificing the piercing capability that hard-use carriers rely on.
Currently, the AD15 is produced under Cold Steel, the brand where Demko's lock designs first reached wide production. Variants include the standard AD-15 with S35VN steel and G-10 scales, and the AD-15 Lite — a more accessible version that keeps the Scorpion lock platform at a lower price point. Both carry the same lock mechanism and core design philosophy that Demko engineered.
For users comparing across the lineup, the AD15 bridges the gap between the Tri-Ad-equipped AD10 and the Shark Lock models like the AD20 and AD20.5. Each uses a different locking mechanism, but all share Demko's core priority: lock strength that approaches fixed-blade performance in a folding platform. Explore the full Demko Knives collection to compare.