Sinorock Integral Drill Steel is mainly used in small-hole drilling, such as stone quarrying, foundation drilling, tunneling, underground
mining, road cutting, and trenching and so on, and equipped with small power rock drills, like air leg rock drills, hand held rock drills, etc. It can reduces the expense of impact energy, improves the drilling speed and efficiency, which can be used for drilling bore hole diameter from 23mm to 45mm usually.Sinorock Rock Drilling Hex22*108mm hard rock Mining Integral drill steel,Integral drill rod Sinorock Rock Drilling Hex22*108mm hard rock Mining Integral drill steel,Integral drill rod