Zero Tolerance and custom knifemaker Todd Rexford joined forces to produce the Zero Tolerance 0801. It starts with a blade of ELMAX powdered steel for a razor edge, excellent edge retention, strength, and toughness. The blade deploys using the built-in flipper. Just pull back on the flipper and the razor-sharp ELMAX blade rotates out of the handle on ZTs glass-smooth KVT ball-bearing system.