Unrelenting sharpness: the strength and density of advanced ceramic or zirconium oxide, allow grinding to microscopic precision by diamond wheels * Ceramic is a pure and healthy alternative unlike steel blades, ceramic blades will never rust or change from its natural state * Kyocera ceramic cutlery is typically half the weight of equivalent knives perfectly balanced; reducing fatigue during repetitive cutting tasks * Ceramic does not absorb food elements, allowing just a quick rinse and wipe with a kitchen towel; Hand wash or dry with kitchen towel * Hand wash only; sharpen using kyocera electric sharpener or mail to kyocera for free sharpening