... ,burr-free,wear-resistance 9CrSi, 52100,D2, H13 Industrial blades for metal, plastic,wood ISO9001 (UKAS) We are manufacturer of various ... knives, top slitter knives, circular knife, metal shear blades, blades for plastic, ice resurfacing knives, crushing knives, etc.we export above ... same time, welcome to visit our factory at any time fly knife for plastic