Twitch knives feature a pass-through lockbar (patent pending) from which the "kick" of the blade sticks through. By pressing on the "kick", one is able to initiate the opening of the blade. SOG Assisted Technology (S.A.T.™) then takes over to finish opening and to securely lock the blade open. S.A.T. (SOG Assisted Technology) brings the standard lockback knife (which is one of the oldest known knife locks on the planet) into the 21st century. This concept will change your idea of what folding knives can be. Once the operator has initiated the blade opening action, S.A.T. propels the stainless steel blade out and firmly locks it into place. SOG have even included a built-in safety that either locks the blade closed or can double lock the blade open. Read more about S.A.T.™. The 6061-T6 machined aluminum handles are hard coated anodized with a graphite color. The drop point, stainless steel blade is "SOG Sharp", like all SOG knives. There is even a safety built in to lock the blade closed for extra security.