Cordless drill driver series bosch gsr bosch professional battery voltage 108 v number of batteries without batteries type of battery li ion battery management replaceable battery gear 2 speed tool holder keyless idle speed max 1 300 rpm max drehmoment hart 30 nm weight 095 kg charge indicator integrated torch drill diameter in concrete 10 mm drill diameter in steel 10 mm drill diameter in wood 19 mm chuck width 10 mm torque levels 20 1