Water stones are a pleasure to use and ceramic water stones are incredibly durable. This 10000 Grit Super Ceramic Stone is designed primarily for sword polishing. It is also suitable for giving the best polish to stainless steel, high alloy steel and blue steel edges that are difficult to polish. The sharpening action is very similar to a best quality natural stone (Awaseto) in that the surface has a bit of elasticity that keeps the tool from skidding. A 2-5/8-in x 2-in x 1-1/4-inch Nagura Stone is included with each Super Ceramic Water Stone.