Bosch Rotary Hammer with SDS-plus GBH 2-28 DV Professional The most powerful tool in its class 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 Technical Specifications Rated power input: 850 W Max. impact energy: 3,2 J Weight: 2,9 kg Length: 379 mm Height: 216 mm Toolholder: SDS-plus Max. drilling diameter in masonry with core cutters: 68 mm Max. drilling diameter in steel: 13 mm Max. drilling diameter in wood: 30 mm Forward/reverse operation Electronic Overload clutch Vibration level (drilling): 11,0 m/s² Vibration level (chiselling): 11,0 m/s² Available In 110v & 240v