www.sog-knives.net The SOG Flash I, model TFSA-97, featured a black Ti-Nitride coating over its AUS 8 stainless steel partially serrated blade. The Flash I uses the SOG Assisted Technology which makes the blade come flying out of the knife when the user initiates the thub stuff. The blade is locked into position with a piston lock integrated into the handle. Pulling back on the piston lock releases the lock so that the blade may return to position in the textured Zytel handle. Other features of the SOG Flash I include a reversible pocket clip for easy carrying and a safety to prevent accidental opening.