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Demko AD20 XL
The Demko AD20 XL is the Shark Lock platform scaled to its largest format. With a 4-inch CPM MagnaCut drop point blade and full titanium construction, it steps well beyond the standard AD20's 3.6-inch blade into territory built for users who want maximum cutting edge in a folding package. At roughly 9.7 ounces and 9.6 inches overall, this is not an everyday pocket knife — it's a purpose-built tool for heavy cutting tasks where blade length and handle purchase matter more than minimizing carry weight.
The Shark Lock functions identically to the rest of the lineup. The spring-loaded fin on the spine locks the blade open with authority and serves as a thumb ramp during use. Closing is a one-hand operation — push the fin forward and the blade drops shut. On a knife this size, that mechanical simplicity becomes a real advantage. There's no fumbling with a lock bar or compression mechanism when you're wearing gloves or working with wet hands.
Blade steel is CPM MagnaCut — a next-generation stainless developed by Larrin Thomas that combines the corrosion resistance of high-chromium steels with toughness figures closer to tool steels like 3V. On a 4-inch blade intended for sustained heavy use, that balance matters. The flat-grind geometry and drop point profile deliver strong slicing performance with a controllable tip, and the stonewash finish helps mask wear over time.
Handles are titanium only — available in smooth or textured configurations, both with a bead-blasted finish. No G-10 option exists at this tier. The titanium frame provides the rigidity the platform needs at this scale without pushing the weight into impractical territory.
Like the standard AD20, the XL is made in the USA with limited production runs. Availability is sporadic, so restocks move quickly. For users who want the Shark Lock in a more conventional carry size, the AD20.5 and Shark Cub offer the same mechanism in progressively smaller footprints. Compare the full range in the Demko Knives collection.