Hammer drill series bosch gbh bosch professional power 710 watt gear 1 speed tool holder sds plus weight 36 kg idle speed max 1 000 rpm blow count max 4 400 countsmin drill diameter in concrete 23 mm drill diameter in steel 13 mm drill diameter in wood 32 mm power supply mains operation impact force 25 joule operating voltage 230 v number of gears 1