A superior knife is a superior advantage. But with all things in life, even the strongest need some care. Keep your exceptional Kasumi knives in their best condition with this Knife Sharpening Ceramic Whetstone Set. The intense finishing stone makes this whetstone the sharpening tool of choice for sushi chefs the world over. The set also includes a non-slip rubber holder to keep the Whetstone in place during use, ensuring precision and safety whilst sharpening. Care for your knives, and they will last you a lifetime. Care for your knives with the Kasumi Ceramic Whetstone. Features: Made in Seki, Japan. Includes a rubber base for holding the whetstone in place. Whetstone is designed to be used with water.