Its distinctive Kopis-inspired handle is precision injection molded out of Griv-Ex with heat-treated steel liners, and this, in addition to our famous Tri-Ad lock, makes for a knife that is incredibly safe and secure. The Spartan also features the patented Demko thumb plate, which can be used to open the knife like a conventional "one-handed opener" or be snagged on the edge of a pocket during the draw stroke and opened at lightning speed!