The material is an ultra-light, non-corrosive, high-tech zirconia used in space and underwater exploration. The densely hard and smooth blade is hand-sharpened and retains a long-lasting sharp cutting-edge for precise wafer-thin cuts and will not transfer metal ions to any food. They weigh much less than steel counterparts, and the ergonomic design help make any repetitive cutting task precise and effortless. These well-balanced kitchen knives become favorites and complement any collection of knives the amateur cook or professional chef may already own. You will be pleasantly surprised at how fun and easy it is to prepare any healthy meal with KYOCERA ceramic knives!