The featherweight blade that stays scary-sharp long after steel gives up. From Kyocera's most popular Revolution Series, this 4.5-inch ceramic utility knife is made from a proprietary zirconia ceramic produced in Japan that holds its edge at least ten times longer than traditional steel knives. It is a great first ceramic knife for the home cook: lightweight and easy to clean, rust-proof and acid-resistant, and it won't brown food or leave a metallic taste. Reach for it to slice fruits, vegetables, and boneless meats with precise, straight cuts. It is not intended for hard or frozen foods. Revolution Series 4.5" ceramic utility knife Proprietary zirconia ceramic blade made in Japan Stays sharp up to 10x longer than steel blades Rust-proof and acid-resistant; won't brown food Lightweight with a comfortable, ergonomic handle Ideal for fruits, vegetables, and boneless meats; not for hard or frozen foods Overall dimensions: 12.2 x 2.4 x 0.9 inches Warranted free of defects in material and craftsmanship