Tonife Kitchen Zirconia Ceramic Kitchen ware -High hardness -wear resistant and sharp for long time -highly hygenic and low risk for contamination -no rusting and easy to cleean -light weight -super ergonomic and comfortable handle use to cut vegetables fruits and boneless meats on plastic or wood cutting board only Do not chop hard food like bones or frozen food. Do not machinewash and do not expose to extreme heat. avoid dropping the knife and keep it away from children.