Use this Kasumi Combination Whetstone for the maintenance and perfect finish of your Japanese knife blades. One side offers coarse 400-grit sharpening that will quickly remove material, helping you put an new edge on the knife and restore the sharpness. The other side, the medium 1000-grit stone, will smooth and finish the edge. This whetstone includes a thick, removable rubber base to keep the whetstone in place. Size: 18×6×3㎝