DTH Bit, DTH Hammer, Button Bit manufacturer / supplier in China, offering Factory API 2 3/8 Reg Rod D76 /89/114/127/152 Drill Pipe 1.5m 2m 3m 4m 5m 6m DTH Drill Pipe, 110p-3.2 Kw (spline) Low Air Pressure Hammer, 8 10 12 Inch High Air Pressure DTH Hammer for Resource Exploration Drilling and so on.