SOG Twitch II Graphite 3 1/2" closed. 2 5/8" AUS-8 stainless partially serrated blade with dual thumb studs. Features S.A.T. (SOG Assisted Technology). The blade is propelled open once the operator has initiated the one handed opening action. Twitch features a pass-through lockbar from which the kick of the blade sticks through. 6061-T6 machined graphite color aluminum handles. Stainless pocket clip. Designed by Spencer Frazer.