The most popular form of Diamond Drilling, able to drill holes up to 1 meter in diameter to almost any depth, vertically, horizontally or inverted, drill bits with Diamond segments welded to them cut the concrete, kept cool with a constant water supply

Rota broach Drilling
The drilling of holes through steel by a special magnetic drill that fastens to the steel its drilling, holes up to 50mm

The drills are powered by Electric or hydraulically.