Kyocera Advanced Ceramic Revolution Series 4.5-inch Utility Knife, Black Blade A great first-time introduction to using a Kyocera ceramic knife in the kitchen, especially for the beginning home cook at a value A 4.5 utility knife for everyday kitchen prep that requires precise slicing and straight cuts Ceramic blades are made from Kyocera's proprietary zirconia material produced in Japan for exceptional quality and beauty Ultra-sharp, pure advanced ceramic blades will maintain their edge up to 10x longer than steel blades Lightweight and easy to clean, the blades will not brown food, are rust-proof and resistant to acids Ideal for slicing fruits, vegetables and boneless meats, not to be used on hard or frozen foods