... Bits, Drifter Rod, Rock drilling tools, drilling bits, Coupling, Shank Adaptors, DTH Bits and hammer. Shandong Sanshan Group Co., Ltd. ("SSG ... ") was established in 2003. It consists of Shandong Rock Drilling Tools Co., Ltd ... Sanshan Natural Gas Co., Ltd. Our Group company's products include steel, rock drilling tools and mining tools for scientific ...