Cordless drill impact driver cordless drill driver series bosch gsb bosch robustseries 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 1 800 rpm blow count max 27 000 countsmin max drehmoment hart 85 nm weight 22 kg charge indicator integrated torch drill diameter in concrete 13 mm drill diameter in steel