Cordless hammer drill battery management replaceable battery number of batteries without batteries series makita dhr gear 1 speed tool holders keyless sds plus weight 35 kg idle speed max 1 100 rpm blow count max 4 000 countsmin drill diameter in concrete 24 mm drill diameter in steel 13 mm drill diameter in wood 27 mm special feature slip clutch dimensions 417 x 84 x 219 cm power supply battery operation battery capacity 4 ah charging t