40t Swivels for HDD Drill Rod Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:40tCustomized:Non-CustomizedStandard:AISI, APILength:Taper-lengthType:HDDMaterial:High Speed SteelUsage:Well DrillingTrademark:SuperiorSpecification:40tOrigin:ChinaHS Code:82071910 Description Pre:Tricone Bit Rock Roller Bit IADC 537 Next:Best Price TCI Tricone Bits/Rock Bits/Drill Bits