Drill Rod/ Drifting Drill Rod/ Extension Rod (1)Steel grade: 20CrNi3Mo equivalent to SANDBAR 64 (2) Thread: R22, R25, R28, R32, R38, T38, T45 ,T51,ST58, GT60 (3)Length: 0.4m-10m (4)Package: in wooden case or in bundles. (5)Productivity: 20000MT / month Shank rod :hex.22x108mm hex.25mm 108mm, hex.25mmx159mm