Cordless drill driver series bosch gsr bosch professional battery voltage 18 v number of batteries without batteries type of battery li ion battery management replaceable battery gear 2 speed tool holder keyless idle speed max 2 100 rpm blow count max 31 500 countsmin max drehmoment hart 75 nm max drehmoment weich 47 nm weight 22 kg charge indicator integrated torch drill diameter in concrete 13 mm drill diameter in steel 13 mm drill dia