knife sets，Five -piece set，Ceramic Zirconia，Eco-Friendly 3-6 inchMaterial: ABS Eco-Friendlysize:3，4，5，6 inch+peeler 3 inch : all length 180mm blade length 80mm thickness 1.4-1.5mm4 inch : all length 206mm blade length 105mm thickness 1.4-1.5mm5 inch : all length 237mm blade length 130mm thickness 1.4-1.5mm6 inch : all length 271mm blade length 155mm thickness 1.4-1.5mmCeramic knife is super sharp， never need sharpening， it is 13 times hard than regular steelCeramic knife has no metal taste when cutting delicate vegetable such as tomatoCeramic knife is Non-reactive with food ，keep original taste and color of fruit and vegetableCeramic knife is easy to clean， no rust， hygiene and keep you away from germ and bacteriaYour ceramic knife works best for slicing boneless meats， fruits and vegetables