we produce various kinds of rock drilling tools, including rotary tri-cone bit, down the hole bits, button bits, cross bits, chisel bits, pick cutters, all steel cross bits, road picks for grader, road planning and trenching bits, drill rod, coupling sleeve, core bits, coal 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. for more information, please visit our web site: