The M21-14SF features AutoLAWKS knife safety, which provides fully automatic actuation. Based on the Lake And Walker Knife Safety (LAWKS), it immediately turns the folder into a fixed blade when the blade is opened and locked. Release the LAWKS lever, release the locking liner, and it folds to an easily carried length. You have the advantages of a fixed blade with-out the disadvantage of a costly sheath carry system. AutoLAWKS still allows the quick and smooth one-hand opening and closing that our Carson series is known for, the result of precision tolerances and Teflon bearings. The ambidextrous thumb studs with checkered surfaces provide instant access in any circumstance. The CRKT production aluminum frame SFs are based on Kit Carsons custom designs, with contoured handles of textured, black, hard anodized 6061 T6 aluminum, with a perimeter radius for a comfortable grip with or without gloves. Stainless steel locking liners with friction grooves give positive locking. Each knife comes with two stainless steel black Teflon-plated clothing/gear clips, extra screws and a Torx tool, allowing four-position carry on belts or webbing tip up, tip down, left or right. Caution: This knife is not designed for tip-up in-pocket carry. The M21-14SF is a true advance in tactical locking liner folders, and is also an outstanding value. Deep-bellied spear point blade, Combined Razor-Sharp & Triple-Point Serrated Cutting Edge.