The ceramic blade on this Kyocera double-edge ceramic slicer in yellow is close in hardness to diamond. This unique blade will stay sharp for ten times longer than any steel blade. This Kyocera slicer also won't rust or affect your food because it's not affected by acids, juices, oils, salts or other elements. The lightweight construction and hand guard make using this slicer easy and safe. You'll find this slicer from Kyocera useful on just about any vegetable or fruit.