1.Material:D2,M2,SKD11,1.2379, DC53,D2+Co and Tungsten Carbide are different materials usually used for Shredder blades according to waste materials. Forged blanks are also available. 2.Key Factors:Distributed hardness,high toughness and strength and excellent wear-resistance are key factors of shredder blades. 3.Surface coating: Tin, AlTin,TiCN,TiAln,etc. All coating for Carbide cutting tools are all available here. 4.Fast Delivery: Stock for common types are in warehouse.