Cordless drill impact driver cordless drill driver series bosch gsb bosch professional battery voltage 18 v battery capacity 2 ah number of batteries with 2 batteries type of battery li ion battery management replaceable battery gear 2 speed tool holder 12 inch internal hexagon idle speed max 1 900 rpm max drehmoment hart 63 nm weight 154 kg drill diameter in concrete 13 mm drill diameter in steel 13 mm drill diameter in wood 38 mm chuck width