The Global Ceramic Water Sharpener is a two-stage, hand held ceramic water stone sharpener for a complete sharpening process. The first stage of sharpening, use the white coarse wheel to sharpen dull and chipped edges. The second stage, use the pink fine wheel for standard sharpening and polishing the blade edges. This is a safe and easy-to-use knife sharpener for any kitchen, simply fill it with water and pull the blade through!