A powerful 550 W motor drives the Bosch pneumatic hammer mechanism, providing 1.7 joules of high impact power. An SDS plus drill chuck enables quick, safe, and tool-free accessory changes. For the chiselling function with Vario Lock, you can choose between 36 chiselling positions, guaranteeing an optimum working angle at all times. The hammer drill is also equipped with Bosch Electronic Speed Control, allowing the correct speed to be easily adjusted to the respective material using the accelerator switch.