Cordless drill impact driver cordless drill driver series bosch gsb bosch professional battery voltage 18 v battery capacity 4 ah number of batteries with 1 battery type of battery li ion battery management replaceable battery gear 2 speed tool holder keyless idle speed max 1 700 rpm blow count max 25 500 countsmin max drehmoment hart 60 nm weight 16 kg integrated torch drill diameter in concrete 13 mm drill diameter in steel 13 mm drill d