Rated power input 850W Max. impact energy 3, 2 j Drilling diameter in concrete with hammer drill bits 4 - 28 mm Highest drilling rate and highest chiselling performance in its class 25% longer lifetime than other rotary hammers in its class for more efficiency 27% less vibration than the predecessor model due to active vibration damping Rotation stop for chiselling Ball grommet for preventing cable breaks Rotating brush plate for equal power in forward and reverse rotation Overload clutch to protect the user and the machine Forward/reverse rotation for dislodging jammed drill bits Continuously variable speed control for clean drilling starts