Up to 50% faster work rate due to higher single impact energy and 100% more lifetime. Absolute control if the drill bit jams thanks to Bosch Electronic Rotation Control (ERC) and in sensitive materials thanks to Bosch Electronic Precision Control (EPC). Comes complete with a keyless chuck, making it also suitable for straight-shank drill bits in wood and metal. Other features: Continuously variable speed control, Right-hand/left-hand rotation, Overload clutch, Sound pressure level 90 dB(A), Sound power level 101 dB(A), Vibration Control for low user fatigue & LED worklight for an optimum view of the work position.