This combination sharpening stone is great for you to keep knife edges sharp. One side offers 400 grit sharpening that helps you easily remove edge material to restore sharpness and the other 1000 grit stone side helps you smooth and finish the edge. Before using it you have to soak it.

Features:

• It includes the combination of two sharpening pieces, one coarse and one fine, 400 grit and 1000 grit on the other side.
• Use the 400 grit side to sharpen the toughest knives and use the 1000 grit side to finish polishing them.
• You have to soak it before using it