... 4.Healthy,Environmental friendly 5.Stain,Rust Proof 6inch eco-friendly,ever sharp and rust proof serrated knife Specification:Model: CKWB6P06Blade Material ... longer life than the traditional steel knife,with no need of sharpening for years. Stain and rust proof ,non-adhesion,very easy ... to clean.No chemical reaction with the food ,no metallic ...