Tricone Bit Steel Tooth Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:5 7,8 127Customized:CustomizedStandard:JIS, AISI, APIType:Core Drill BitMaterial:Solid CarbideUsage:Well DrillingTrademark:SuperiorTransport Package:Wooden BoxOrigin:Hebei Description Pre:Replaceable Tip Drill/Detachable Head Drill Next:Best Selling Rock Reamer with Roller Cones