Rada Knife Sharpener R119 (3 1/2" long by 1 1/2" wide by 2" tall) Two specially hardened steel wheels are positioned at the optimum angle for quickly restoring a sharp edge. All you need to do is pull the blade through the wheels a few times and like magic, a sharp edge is restored! The R119 quick edge sharpener is truly amazing. It works on pocketknives as well as your favorite cutlery.