The EdgeWare Diamond Elite Santoku, Standard and Serrated Manual Knife Sharpener is a versatile two-stage knife sharpener. Coarse and fine settings are designed for sharpening both straight and serrated knife blades. Coarse sharpening slots feature preset diamond rods that quickly sharpen a knife edge at the correct angle every time. Ceramic stones leave the finest finish on a knife edge. The knife sharpener also provides two stages for Asian and santoku double-bevel knives. Also sharpens household scissors.