The 1250w motor and the pneumatic hammer drill with 35 joules of impact energy ensure a fast drilling progress even in the hardest concrete and natural stone by means of the switch on stop holes can also be made in wood and metal the combi chamber can be used for powerful chisel work technical specifications power 1 250 watts idling speed 0 850 rpm beat 0 4 100 bpm power 35 joules drilling capacity in concrete 32 mm in wood 40 mm in steel 13 mm weight gross net