... ,SGS. 4.Healthy,Environmental friendly 5.Stain,Rust Proof China high quality 6inch serrated ceramic knives Specification: Model: CKWBS6P08 Blade Material:Ceramic ... broned food.Please use with a plastic or wooden cutting board ,Avoid cutting on marble ,stone, glass surface.wash by hand ... ,pleases do not try to sharpen it by yourself. China high quality 6inch serrated ceramic knives