Chef'sChoice 316 Diamond Hone Knife Sharpener for 15-Degree Knives with Precision Guides to Sharpen Straight and Fine Edge Knives, 2-Stage, Black 120-watt sharpener designed especially for Asian-style knives Stage 1 uses fine 100-percent diamond abrasive to sharpen and hone Stage 2 uses ultra-fine 100-percent diamond abrasive to strop and polish Precision guides sharpen at 15 degrees ensuring thin, razor-sharp edges Measures 8-1/2 by 5 by 4 inches; 1-year limited warranty