The Flash family of knives features SOG Assisted Technology (S.A.T.), which employs a powerful piston lock that is easily released with a sliding button. The Flash II (Digi Camo - Black TiNi) comes standard with ACU camouflage Zytel handle and black TiNi 1/2 serrated blade/clip/pivot. All Flash knives come standard with SOG's patent pending, reversible bayonet mounted clip that ensuresthe lowest, most discreet carry possible. We also had the foresight to incorporate an additional safety lock that gives added security when the blade is closed. SOG's unique cryogenic heat treatment process increases the toughnessand wear resistance of our blades. Cryogenic Heat Treatment takes the knife slowly down to temperature less than -300°F and then back to room temperature. This stress relieves the material on an atomic level and increases overall strength as well as edge retention. Knife edges stay sharp longer with significantly less micro-fracturing and edge-chipping. It's this dedication to making your knife SOG sharp that sets us apart from the rest.