Luoyang Sinorock Engineering Material Co., Ltd. is specialized in the development, production and sales of Rock Bolt,Self-Drilling Anchor Bolt. Sinorock has been striving to provide excellent quality rock drilling tools for tunneling project, mining exploration, hydro engineering projects and other infrastructure construction etc.Luoyang Hengnuo Anchor Technology Co., Ltd, the subsidiary of Luoyang Sinorock Engineering Material Co., Ltd. is a professional manufacturer of rock drilling tools with ISO 9001:2008 certification and CE certification. It's the production base and domestic brand of Sinorock.