... hardness ceramic knife set 2,eco-friendly 3,SGS,FLGB,pony testing 4,edge hardness and sharpness ceramic knife Main features ... growthCeramic knives maintenance: Only use plastic or wood cutting board As with only knife, avoid dropping, throwing/general misuse Avoid ... ceramic knife is made Knife will retain its sharpness despite tiny chippingPacking: black magnet with EVA 3-piece Ceramic Knife Set with ...