When it comes to narrow hole diameters in small-scale drift or tunnel areas or dimensional stone quarries for small projects or remote places,Integral Drill Steels equipped with small power rock drills, like the hand-held and air leg rock drills ,the small rig-mounted rock drills,would be needed in application.It can reduce the losses of impact energy, improve the drilling speed and efficiency.Usually the drilling boring can reach to 24mm-44mm,shape is hexagonal type,shank size is 19mm-22mm,length available is from 600mm-9600mm.Also we supply 19mm plug hole rods.What ever the situation is ,we do have solutions to match for you.  

Pls check the following Spec.Sheet.(Note: The sheet only covers part of our integral steel product.)