... /minVery softSoft Marl, Clays, Sands, Salts etc.1187.3~346.17 3/8~13 5/8441~735120~50softClays, Soft Shale, Marl, Sands, Salts ... etc.295.2~174.63 3/4-6 7/8245-490100-50187.3~346.17 3/8-13 5/8490-78490-40Medium softShale, Marl ... .2-174.63 3/4-6 7/8294-53980-40Contact information TCI Bit 165 mm with 3 1/2" REG Pin for Hard Rock