... bits and machines used in mining and construction. We manufacture rock drill bits and machines used in mining and construction scope ... / 89 / 102 / 115 with thread R25, R32, R38, T38, T45, T 51Chisel bitshead 32 / 34 / 36 / 38 / 40 / 42 / 43 with ... thread R32, R38, T38, T45, T51Coal bitshead 28 / 42 / 44 Rock Drill Bits