Chef'sChoice 1520 Angle Select Diamond Hone Sharpener, Black (Discontinued by Manufacturer) Electric 3-stage knife sharpener for straight, serrated, single-, and double-bevel knives Puts a sharp edge on european/american (20-degree) and asian-style (15-degree) knives Patented flexible stropping/polishing disks for a microscopically polished edge 100-Percent diamond abrasives sharpen and hone; knife guides Measures 12 by 6-1/5 by 6-2/5 inch; 3-year limited warranty