... type: hex or round(plain) 3)length:280mm-6400mm Extension drill rodt45 extension rodThread: R32, R38, T38, T45, T51Top Hammer / ... Drilling Tools:Coupling Sleeves, Thread Button Bits, Extension Rod, Shank Adaptors.Extension drill rodD: 32,38,45,51mmL: 800-6100mmThread ... R45, R51, H32, Hex35, T45, T51, Length: 1000mm-6100mm extension rods, driftiing rodsProduct NameDia(mm)ThreadLength(mm)Hex Rods and ...