Impact drill series bosch psb bosch compact expert power 1 000 watt gear variable speed tool holder keyless weight 28 kg idle speed max 1 100 rpm blow count max 47 600 countsmin torque max 60 nm drill diameter in concrete 20 mm drill diameter in steel 16 mm drill diameter in wood 40 mm special features speed pre selection auto lock rightleft rotation power supply mains operation length of cable 4 m number of gears 2