The Miyabi Pull-Through Knife Sharpener features ceramic rollers, allowing your knives to be sharpened more smoothly and with maximum comfort Pre-set sharpening angle ensures your knife is always in the correct sharpening position First, pull the blade through the diamond-coated ceramic roller several times to achieve a beautiful sharpening edge Follow by pulling the blade through the ceramic rollers several times at the end, to make the knife exceptionally sharp Non-slip due to silicone nubs on the base of the sharpener ensure stability on the work surface for safe use Ergonomic, easy-care plastic handle is suitable for right or left handed use, which the hand guard ensures safe use Do not immerse under water Wipe with a damp cloth if necessary and dry thoroughly