Jewelstik 10-Inch Gourmet Diamond Knife Sharpener, Black/Orange Completely made in the USA Jewelstik provides the most superior diamond coating on the market. A 600-grit diamond surface is proven to be beneficial for a quick edge and yet not too aggressive for your cutlery Our diamond sharpeners and lightweight, well balanced and easy to use The lens shaped steel shaft permits more efficient sharpening than ordinary cylindrical-shaped tools by allowing more surface to be sharpened in less time Clean with soap and water and wipe with a lint-free cloth