Unrelenting Sharpness: This hardness translates into a rock-like edge; edge retention is the most significant benefit of using ceramic blades * Unparalleled Purity: Ceramic is a pure and healthy alternative * Ultra Lightweight: Ceramic blades are typically half the weight of equivalent metal blades * Material composition: Blade - Zirconium Oxide, Handle - ABS Plastic * Hand wash only; or mail to Kyocera for free sharpening