Columbia River Knife & Tool - Part Serrated M21 Linerlock Knife with Gray Aluminum Handles: Model CR-2112. 4 1/4" closed. Part serrated AUS-8 stainless spear point blade with ambidextrous thumb studs and "Carson Flipper". Skeletonized charcoal gray hard anodized 6061-T6 aluminum handles with stainless pocket clip. Also features the LAWKS system.