We Golden Drill Group Co,Ltd. Is one professional manufacturer / exporter of rock drilling tools in China.The products quality are strict according the API and ISO9001 standard. Our main products include , tricone bit(3-7/8``to 26``Covers almost all IADC codes),down the hole bits and hammer( DHD,COP,BR,SD,QL,Mission Shank), button bits, cross bits, chisel bits, coupling sleeve,casing tube, core tube, double core barrel, single core barrel, reaming shell, diamond bit, , PDC bit,,hard alloy bit,drilling pipe , drilling rig, pick cutters, all steel cross bits, road picks for grader, road planning and trenching bits, intergral drill steel,drill rod, core bits, coal cutters, pick cutters, carbide tips, ,and other rock drilling equipment, which are widely used for mineral exploration, geological prospecting, excavation engineering, tunneling, mining, quarrying, construction for road, highway, civil engineering. More details please kindly visit our website: www.goldendrillgroup.com Being one specialist maker of drilling tools and cast, we have full confidence in offering you our best products with top good quality, competitive price and quick delivery. our products sell well in domestic market and even enjoy a good sales in more than 30 countries and regions. Sincerely hope that the new business relationship will be established in the near future with our mutual effort.