... bearing) HA (rubber sealed journal bearingaircooled bearing typeFormation or layer soft ,medium soft ,hard,medium hard,very hard formationButton size (extra features ... Marl, Clays, Sands, Salts etc.1187.3~346.17 3/8~13 5/8441~735120~50softClays, Soft Shale, Marl, Sands, Salts etc.295 ... etc.795.2-174.63 3/4-6 7/8294-53980-40Contact information TCI Bit 165 mm with 3 1/2" REG Pin ...