... copper,steel,iron 4.Blank and finished products carbide die for nail, tungsten carbide plugs, louver dies: Products features: 1. wear-resisting: ... 4 days!5. work eara are 20% longer, our tungsten carbide drawbench norm using life are double increaseed.6. using top ... Steel Company, Xinjiang Bayi Iron & Steel company and Anhui Huai Mining Steel Rope company. We enjoy the good reputation in domestic ...