Metabo 1/2 inch hammer drill with the following features: Vario (V)-electronics for working at customized speeds to suit various application materials. Thumbwheel for speed preselection Robust die cast aluminum gear housing for optimum heat dissipation and durability Rotating carbon brush bridge for maximum power even when rotating counter-clockwise, e.g. when removing jammed screws Meabo Marathon motor with dust protection for long service life Metabo S-automatic torque limiting clutch: mechanical decoupling of the drive for safe working should the tool stop unexpectedly. Forward and reverse rotation Spindle with hexagonal recess for screwdriver bits for working without chuck Cable-protecting ball joint for the best freedom of motion when working