Kyocera Ceramic Fine Mill, Black Top is 4.9" height, Unparalleled Purity. Ceramic is a pure and healthy alternative. Unlike steel blades, ceramic blades will never rust or change from its natural state. It is totally impervious to acids, juices, oils, salts, or other elements. Ultra Lightweight. Kyocera ceramic cutlery is typically half the weight of an equivalent steak knife. Since the ceramic blade is so light, no artificial weight is added to the handle. Advanced ceramic grinding mechanism provides consistent, durable performance and will never rust. Rust proof!