Extrema Ratio Fulcrum C. 8 3/8 overall. 4 1/4" partially serrated N690 stainless cobalt steel tanto blade with black finish. Black Forprene handle with visible tang end. Black ABS sheath with Tek-Lok." 8 3/8" overall. 4 1/4" partially serrated N690 stainless cobalt steel tanto blade with black finish. Black Forprene handle with visible tang end. Black ABS sheath with Tek-Lok.