Cordless drill impact driver series bosch psb 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 blow count max 19 500 countsmin max drehmoment hart 30 nm weight 136 kg charge indicator integrated torch drill diameter in concrete 6 mm drill diameter in steel 8 mm drill diameter in wood 20 mm torque levels 20