TCI Type 115/8 Tricone Bit for Water Well Drilling Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:IADC537Customized:CustomizedStandard:APILength:Taper-lengthType:Center Drill BitMaterial:Tungsten CarbideUsage:Well DrillingTrademark:superiorTransport Package:Woodern BoxOrigin:Hebei Description Pre:Spring Well Drilling Tricone Bit 13 5/8 Inch Next:API 9 7/8" TCI Tricone Rock Bit for Water Well