Kyocerca Advanced Ceramic Electric Diamond Knife Sharpener- for Ceramic and Steel Knives Diamond Grinding Stone #600 Grade: Electric powered diamond grinding stone can take up to .5mm off blade Knife Guide Slot: To keep knife at a fixed angle, very user-friendly and safe Assist Roller: To prevent too much sharpening and controls even pressure Safety Cover: Grinding and dust are completely contained within cover Battery Powered: 4 AA batteries not included Electric Diamond Wheel Knife Sharpener for both Kyocera ceramic or steel knives [DS-38] Electric Sonic Wave Sharpener for a variety of cutting tools [SS-30] Manual Diamond Wheel Knife Sharpener for both Kyocera ceramic or steel knives [RSD-01] Steel Knife Sharpener for steel knives [RSN-20BK] Ceramic Sharpening Rods for steel knives [CSW-12-BK/CSW-18-BK] Developed for at-home sharpening and refreshing of knife blades Convenient knife slots and assist roller makes sharpening accurate For right-handed sharpening Easy and clean operation with safety cover to contain grinding dust For right-handed use only ABS plastic exterior Made in Japan Battery operated and requires 4 AA batteries  for operation - not included The diamond grind stone will sharpen to a  medium/fine edge #600 grit diamond grinding stone Unit can take a .5mm nick off a ceramic blade and can achieve the optimal 35 cutting angle Convenient knife guide slot and assist roller for controlled pressure and to keep blade at fixed angle for sharpening Please note that knife slots cannot accommodate thick blades such as paring knives