... rock drilling, blasting holes and other drilling works Drill Rod/Tapered Drill Rod Taper drill rod is used for rock drilling, blasting ... . (6)Productivity: 20000MT / month Integral Drill SteelIntegral Drill Steel is used by a hand held drill machine in Underground mining and for ... held rock drills, etc. It can reduces the expense of impact energy, improves the drilling speed and efficiency, also it ...