Kitchenaid Ceramic 5-Inch Santoku with Sheath Ceramic knives made of Zirconia have a thinner, sharper, and stronger blade for fine slicing Cutting with Ceramic cutlery offers precision and mastery with every cut Ceramic cutlery should only be used on soft skin vegetables, fruits, and produce such as kiwis, tomatoes, and onions Do not use ceramic knives for cutting hard density foods such as yams, potatoes, and frozen meats as this may cause your blade to dull, chip, or break Hand wash only