Impact drill impact rate 0 25600 bpm torque 13 5 nm drill capacity in steelmasonrywood 131630 mm chuck capacity 13mm keyless series bosch gsb bosch professional power 750 watt gear 1 speed tool holder keyless weight 22 kg idle speed max 2 800 rpm blow count max 47 600 countsmin torque max 135 nm drill diameter in concrete 16 mm drill diameter in steel 13 mm drill diameter in wood 30 mm special features speed pre selection auto lock