SOG Twitch XL Tanto. Black anodized handles. 4 1/4" closed. Stainless pocket clip. Twitch Lockbacks. Features S.A.T. (SOG Assisted Technology). The blade is propelled open once the operator has initiated the one handed opening action. AUS-8 stainless blade with thumb stud. Twitch features a pass-through lockbar from which the "kick" of the blade sticks through. 6061-T6 machined aluminum handles. Designed by Spencer Frazer.