The CRKT M21-04 "Big Dog" knife features a hard anodized 6061 T6 aluminum handle with a stainless steel locking liner paired with CRKT's patented AutoLAWKS automatic safety, which turns the 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.
The Big Dog M21-04 has a hard anodized charcoal gray aluminum handle and a non-reflective frost finished 8CR14MoV stainless steel blade. The deep-bellied spear point style blade has a hollow grind and a plain cutting edge. One-hand opening is made simple with dual thumb studs and a Carson Flipper for quick deployment. Teflon bearings at the blade pivot assure velvety-smooth action.