... machines used in mining and construction. We manufacture rock drill bits and machines used in mining and constructionButton bits ... 48 / 51 / 57 / 64 / 70 / 76 / 89 / 102 / 115 with thread R25,R32,R38,T38,T45,T51Chisel bits:Head 32 ... / 34 / 36 / 38 / 40 / 42 / 43 with socket 22,24,25 and the taper 12°,6°,7 ... Retrac bits:Head 51 / 64 / 76 / 89 / 102 with thread R32,R38,T38,T45,T51Coal bits:Head 28 / 42 ...