- Brand new and high quality 2. 3 steps design, sharpen knifes quickly 3. Ceramic is for everyday sharpening; Coarse is for dull knifes; Fine is for everyday maintenance and remove rough edge after Ceramic 4. Curved handle, comfortable to hold 5. Suitable for kitchen knifes, fruit knifes, cleavers, slicing knife, and etc; Not suitable for scissors, serrated blade knife and ceramic knife 6. Do not put it in dish-washing machine or soak into water