... set 2,Size:4"-7" for blade 3,Hygiene,Abrasion resistance 4,sharpness and hardness 5,rust proof Product Description Blade ... metal knife;3, Health and Hygiene: Lead-free, non-toxic, acid resistance, alkali resistance, never rust, health environmental protection; keep food color, flavor ... as cutting support. Don't use on earthenware, glass or porcelain surface.* Don’t cut hard, frozen or boned food.* Avoid ...