Plastic rubber double shaft shredder blades &recycling shredder knife&wood chipper machine shredder blade shredder knife is mainly used in recycling processing for shredding and crushing metals, such as electronic scrap, recycling plastic and rubber lumps, tire, PS, PP, PA, PE, PVC, large plastic pipes, waste paper and film, and sheet material. 1. Material :D2,SKD11,HSS,9CRSI,T10... 2. Hardness: HRC 56-63 According to customers request. 3. Triple tempt for optimum wear resistance. 4. Precise heat treatment. 5. Excellent cutting longevity and wear resistance. 6. High intensity,high toughness,small thermal deformationShredder Blade manufacturers website:http://www.cnrecyclemachine.com/shredder/shredder-blade/