Cordless drill driver series bosch gsr bosch professional battery voltage 108 v number of batteries without batteries type of battery nimh battery management replaceable battery gear 2 speed tool holder sds plus idle speed max 1 300 rpm max drehmoment hart 20 nm weight 09 kg integrated torch drill diameter in concrete 10 mm drill diameter in steel 10 mm drill diameter in wood 30 mm charging time 45 min chuck width 10 mm torque levels 20