Cordless combi hammer number of batteries without batteries battery management replaceable battery series ryobi r18 gear 1 speed tool holder sds plus idle speed max 1 300 rpm blow count max 5 000 countsmin drill diameter in concrete 16 mm drill diameter in steel 13 mm drill diameter in wood 16 mm special features rotation stop soft handle power supply battery operation impact force 13 joule number of gears 1