DTH Bit, DTH Hammer, Button Bit manufacturer / supplier in China, offering Heavy Duty R32-45mm Thread Button Bits with Enhanced Wear Resistance for Mining Operations, Tungsten Carbide 12 Teeth T32 64mm Trapezoidal Thread Button Bits, Good Factory Price 36mm 7 Thread Buttons Top Hammer Drill Bit Hard Soild Rock Hand-Held Drill Hammer Button Bit and so on.