Drilling bits for mining, customized. We are Hunan O. E. D hard metal, which was established in the hometown of hard metal of China --- Zhuzhou city in Hunan province. A professional Chinese manufacturer of tungsten carbide products such as rods, strips, rings, drilling bits, indexable inserts, wear parts, drawing pellets, and customized products. Along with our company growth, we hope to build business with more company abroad.