Japanese Professional Water Rolling Knife Sharpener (English Language) Easily and quickly sharpens your knives the way Japanese chefs do! Water rolling system lubricates and cools, resulting in superior sharpness Ceramic grindstones, rubber feet for stability and safety while sharpening Sharpens all straight-edged kitchen and household knives (stainless and iron, single and double edged) Compact size for storage (approx. 8in x 3in x 3in)