The ceramic blade is made from Kyocera's very own proprietary zirconia material produced in Japan for exceptional quality Ultra-sharp, the advanced ceramic blade will stay sharper up to 10x longer than metal blades Lightweight and easy to use, the mandoline will not brown food, is rust-proof and resistant to acids Safe 4" wide design features corner notches to secure over a bowl and includes handguard for protection Achieve smooth, perfect even slices fast Dishwasher safe