Professional manual 3-stage sharpener for super sharp edges on all your knives (15 , 20 and serrated edges) Separate sharpening and honing stages, for razor sharp edges Creates double beveled edges that last longer 100% diamond abrasives in all 3 stages: diamonds are the hardest known material, sharpen faster than any abrasives, create sharper edges and never heat or detemper the knife edge Sharpens the entire blade length, tip to bolster or handle Fast, safe, and easy to use Safe for quality knives Easy to use, right or left handed Ergonomic design fits all hands Slip resistant rubber feet hold fast to the work surface