Maintain your investment in quality cutlery with the Chef's Choice M312 Diamond UltraHone Knife Sharpener. Compact and easy to use, this handy tool will give your knives better than factory edges. Two-stage process: 100% diamond abrasive coated disk in Stage 1 and a stropping/polishing disk in Stage 2. Highly precise guides hold the knife in the proper position while you sharpen for foolproof results. Great for all types of knives: straight edged, serrated, household knives as well as sporting and pocket knives. Model number: M320 ; Dimensions: 8.25 wide x 4.25 high x 4 deep. Weight: 3.8 lbs. Assembled in the USA.