Chef's Choice 4635900 EdgeCraft ChefsChoice Sportsman Three Stage Manual Knife Sharpener #4635 Professional manual three-stage sharpener for Super sharp edge on sports knives Also great for 15 or 20 degree edge household knives Separate sharpening, honing, and polishing stages for Razor sharp edge Creates double bevel edges that last longer 100% diamond abrasives on all three stages