Best Price TCI Tricone Bits/Rock Bits/Drill Bits Beijing Superior Drilling Equipment Co., Ltd. Base Info Customized:CustomizedStandard:JIS, AISI, APILength:Taper-lengthType:Core Drill BitMaterial:Solid CarbideUsage:Well DrillingTrademark:SuperiorTransport Package:Wooden BoxOrigin:Hebei Description Pre:40t Swivels for HDD Drill Rod Next:30 Inch HDD Hole Opener with Tricone Pilot for Mud Motor Drilling Reamer