Kyocera Revolution knives are the ultimate cutting tools for everyday slicing of fruits, vegetables and boneless meats. The ergonomic handles provide a comfortable and highly controlled grip. Kyocera advanced ceramic is a material close in hardness to a diamond with a rock-like edge that will not roll compared to steel blades. The result is a razor sharp blade that retains its original sharpness more than 10 times longer than steel knives. Ceramic is a pure and healthy alternative. Unlike steel knives, ceramic blades will not transfer metal ions to food, nor corrode from acids or oils in fruits and vegetables. Ceramic will never rust. At half the weight of and equivalent steel knife, a ceramic knife becomes a comfortable extension of the hand, reducing fatigue during long, repetitive cutting tasks. Made in Japan with a lifetime warranty.