Chisel Bits, Retrac Button Bits, Drifter Rod, Rock drilling tools, drilling bits, Coupling, Shank Adaptors, DTH Bits and hammer. Shandong ... ("SSG") was established in 2003. It consists of Shandong Rock Drilling Tools Co., Ltd., Wuyue Special & Rock Drill Steel Co., ... Ltd. Our Group company's products include steel, rock drilling tools and mining tools for scientific research, development, trading and ...