The CRKT M21 is another Kit Carson design that features a stainless steel InterFrame build with a locking liner. CRKT's patented AutoLAWKS automatic safety turns this folder into a virtual fixed blade automatically. The M21 model features a removable stainless steel pocket clip. All fasteners, including the clip screws, are Torx. One-hand opening is made simple with dual thumb studs and a Carson Flipper for quick deployment.