Hammer drill series bosch gbh bosch professional power 650 watt gear 1 speed tool holder sds plus weight 23 kg idle speed max 1 300 rpm blow count max 4 980 countsmin drill diameter in steel 13 mm drill diameter in wood 30 mm special features speed pre selection rightleft rotation impact stop overload protection dimensions 325 x 212 cm power supply mains operation impact force 17 joule operating voltage 230 v number of gears 1