The rotary hammer with SDS-plus GBH 2-28 DFV Professional with 850 w power is the most powerful tool in its class.It has the highest drilling rate and highest chiselling performance in its class.It has 25% longer lifetime than other rotary hammers in its class for more efficiency and 27% less vibration than the predecessor model due to active vibration damping.Quick-change chuck for fast changes between drilling with impact in concrete and drilling without impact in wood and metal.It has the overload clutch to protect the user and the machine and forward/reverse rotation.