The Revolution Series is a great introduction to advanced ceramic knives made from Kyocera's proprietary zirconia produced in Japan for exceptional quality Ultra-sharp, pure advanced ceramic blades will maintain their edge up to 10x longer than steel blades Lightweight and easy to clean, these ceramic 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 Dishwasher safe