... drill rods Thread type:R25,R28,R32,R38,T38,T45,T51 Hex25,Hex28,Rd32,Rd38,Rd45,Rd51 Length:1000-3660mm BETOPPER ----Thread drill ... rodsThread drill rods are made by hollow drill steels, there are two shapes ... ,R32,R38,T38,T45,T51,ST58,GT60 threads, and different length of rods are available from 600mm to 6400mm usually. Product ...