Impact drill series bosch psb bosch compact universal power 650 watt gear 1 speed tool holder keyless weight 19 kg idle speed max 3 000 rpm blow count max 48 000 countsmin torque max 9 nm drill diameter in concrete 14 mm drill diameter in steel 12 mm drill diameter in wood 30 mm power supply mains operation operating voltage 230 v number of gears 1