Hammer drill series bosch gbh bosch professional power 900 watt gear 1 speed tool holder sds plus weight 47 kg idle speed max 800 rpm blow count max 3 600 countsmin drill diameter in concrete 20 mm drill diameter in steel 13 mm drill diameter in wood 32 mm special features speed pre selection rightleft rotation overload protection anti vibration dimensions 40 x 226 cm power supply mains operation impact force 5 joule operating voltage 23