Dual surface diamond sharpening stone grit #400 and grit #1000. Use wet or dry to sharpen all types of metal knives including ceramic knife. Heavy and stable in use. Warp free as metal plate infused with diamond is 8mm thick. A flat surface ensures knife angle is not altered when sharpening is done with a guide or free hand. Start sharpening with coarse grit and end with fine grit #1000 Do not use too much hand pressure. Allow the weight of the knife do the sharpening with light pressure.
Wipe dry after wet use and until completely dried only then cover for storage. Kneadable eraser rub over diamond surface pick up metal particles removed during dry sharpening.
