The Kataoka Brieto water sharpener 3 is a high-quality sharpening tool designed specifically for double-edged knives. Made in Japan, this sharpener ensures precision sharpening for a razor-sharp edge every time. The water sharpening system helps to prevent overheating and damage to the blade, while the compact design makes it easy to use and store. this must-have tool for maintaining the sharpness of your knives.