Superior Tricone Bit for Well Drilling Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:12 1,4 inchType:Impact DrillUsage:Metal Drilling, Well DrillingCertification:AISITrademark:SuperiorTransport Package:Wooden BoxSpecification:12 1,4Origin:HeibeiHS Code:82071910 Description Pre:Diamond Polishing Pad for Stone Next:Ltk48 Hq PCD Surface Set Diamond Reaming Shell