Maintain the razor edge of your Global knives with this efficient manual sharpener from Japan. Its coarse and fine wheels hone the blade to razor sharpness in stages, while a water slurry keeps the blade and wheels clean during operation. The Global Ceramic Water Stone Sharpener consists of two ceramic wheels. The first stage is a white coarse wheel and the second stage is a pink fine wheel for a complete sharpening process. Since the sharpening groove is not parallel, the oblique angle of the ceramic wheel is able to restore the razor sharpness of the knife.