9 1/2 Inch Tri-Cone Bit IADC 637 for HDD Rock Reamer Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:9 1,2 InchCustomized:CustomizedStandard:AISI, APIMaterial:Tungsten CarbideUsage:Well DrillingTrademark:SuperiorTransport Package:Wooden BoxOrigin:ChinaHS Code:8207199000 Description Pre:HDD No Dig Pilot Drilling 8 1/2 Inch Milled Tricone Bit IADC127 Next:High Quality Matrix PDC Bit