Hammer drill drilling capacities concretesteelwood 261330 mm blows per minute 4000 bpm impact energy 26 j series bosch pbh power 720 watt gear 1 speed tool holder sds plus weight 3 kg idle speed max 1 450 rpm blow count max 4 000 countsmin drill diameter in concrete 26 mm drill diameter in steel 13 mm drill diameter in wood 30 mm special features rotation stop speed pre selection rightleft rotation soft handle electronic speed control