Rotary Hammer Drill Machine - Powerful three-speed drill with extra high torque. Robust mechanical gearbox with oil bath lubrication. Robust die cast aluminum gear housing for optimum heat dissipation and durability. Vario (V)-Electronics for working at customized speeds to suit various application materials. Safety clutch: mechanical decoupling of the drive for safe working should the drill stop unexpectedly. For easy drilling of larger diameters and driving in of very long screws.