Combi hammer power supply battery operation chuck type keyless type li ion combo pack component cordless hammer drill series makita da power 230 watt tool holder keyless weight 34 kg idle speed max 950 rpm blow count max 4 700 countsmin torque max 40 nm drill diameter in concrete 24 mm drill diameter in steel 23 mm drill diameter in wood 27 mm special features soft handle rightleft rotation dimensions 353 x 85 x 213 cm battery vol