Casa Neuhaus Black Series Ceramic Knife - 5 inch Utility Knife - Black Ceramic Blade & Stainless Steel Handle - Includes Knife Sheath and Black Series Gift Box Diamond sharp black ceramic blade (twice as sharp than white ceramic blade) with stainless steel handle Lifetime warranty No funny taste on food, cleaner than steel blades and lightweight Includes knife sheath and black series gift box with magnetic closure Ceramic Knives Care Instructions: Using the knives to cut hard substances such as bones and frozen foods may cause chips in the blade of the knife which will directly affect sharpness of the knife. When using the knife avoid using it like a tool for prying and always use a chopping board when using the knife. Other materials such as glass, stones or marble might affect the knife's sharpness; which may lead to breakage of the knife. Hand wash only.