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 Tianjin Grand Construction Machinery Technology Co., Ltd., deeply engaged in rock breaking tools more than 20 years. We are offering R&D, precision manufacturing, international trade and drilling tools solution service, while now is growing up as a leader of global rock breaking tool industry.Our head office is located in Tianjin city which is  a municipalities city directly under the China Central Government. Tianjin city has airport and seaport, which also is a beautiful modern city. Our manufacturing center is located in Qianjiang city Hubei Province. Our modern production lines have CNC machining center and CNC lathe, having modern management level and manufacturing ability. The production center is owning more than 290 staffs(13.8% of them are engineers).Our products cover fields of tunnel shield, mining excavation, rotary cutting drilling, trenchless reaming guide drilling, well geothermal engineering bit, oil drilling and production, foundation pile machine engineering and so on. We insist combinng the development of products and market, and we design and manufacture products that meet the personalized requirements of customers according to their needs, so that we can provide the best solution and  reduce the comprehensive activity cost of users with high quality products and professional services.  We have established a complete domestic and international sales network, and our products have exported to the United States, South Africa, Brazil, Iran, Malaysia etc. through a variety of channels. We have established and maintained long-term contacts with the industry-elites all over the world.