tap hole drill rod

Shank H22*108mm, H19*108mm, H25*108mm and other size can be customize .  different lengths are available from 400mm to 6000mm usually. It can reduces the expense of impact energy, improves the drilling speed and efficience, also it can be used for drilling bore hole diameter form 19mm to 41mm usually. Each rods use premium quality alloy steel and excellent quality tungsten carbide to assure high drilling performance.