Drill Bits DTH Hammer Drill Bar manufacturer / supplier in China, offering CIR 130 Low Pressure DTH Drill Bits with Tungsten Carbide Button for Drill Rig Hammer Tools, Diamond Tool/Cutting Wire for Sawing Concrete and Reinforced Concrete, 26mm Button Bit Rock Drill Bits Taper Chisel Bit 26mm Drill Bit and so on.