We have Horizontal Directional Drills that are capable of drilling holes in rock from low mpa such as sandstone to high mpa such as granite and bluestone, these drills utilize a recycling system that filters out the rock cuttings and allows the continual re-use of the water supply enabling the system to be environmentally friendly and efficient .
BTB Australia also has a number of specialised rock tooling which can open holes in rock from 100mm to 1.2m.