SOG FOLDING KNIFE FLASH FL. The Flash FL is an honest, no-nonsense flipper knife with an eye on functionality. With a stonewashed 3.44" drop point blade it excels in a variety of cutting tasks. The thumb stud makes deployment easy and the frame lockup is nice and tight. The handles are made from stainless steel and textured to grip onto your hand firmly. With its lightweight, all-metal construction, the Flash FL is an entry-level knife built to last.