HDD Drilling Pilot Bit/Tricone Bit Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:IADC217Customized:CustomizedStandard:APILength:Taper-lengthType:Center Drill BitMaterial:Tungsten CarbideUsage:Well DrillingTrademark:superiorTransport Package:Woodern BoxOrigin:Hebei Description Pre:High Quality S145 89mm HDD Drill Rod for Ditch Witch Drills Next:Tricone Bit/Pilot Tricone Bit for Trenchless Drilling