... tricone rock roller bit by ISO9001&API best bearing system 20 years history Milled Tooth Rock Roller Bits: ... C,Western unionDelivery termsBy sea or by airDelivery timeWithin 3 to 7 daysMarketCanada, USA,Middle east ,Africa, ... softSoft Marl, Clays, Sands, Salts etc.1187.3~346.17 3/8~13 5/8441~735120~50softClays, Soft Shale, ... 2-174.63 3/4-6 7/8294-53980-40Contact information TCI Bit 165 mm with 3 1/2" REG ...