... rock drilling machines. We manufacture rock drill bits and machines used in mining and constructionButton bits: Head 45 / 48 / 51 / 57 / 64 ... / 36 / 38 / 40 / 42 / 43 with socket 22,24,25 and the taper 12°,6°,7°Cross bits:Head 32 / 34 ... / 40 / 42 / 43 / 44 / 46 with socket 22,24,25 and the taper 12 °,6°,7° Retrac bits:Head 51 / 64 ...