The hitachi dh24dvc sds plus hammer drill with three mode action in roto stop ideal for hammer drilling rotary drilling or chiselling variable speed and reverse safety clutch for use with sds chisels points and drill bits multi angle chisel setting replaceable carbon brushes supplied with 2 x 24 volt 20ah ni mh batteries a 1 hour charger and carry case specifcation mode 3 rotary sds drilling chisel only no load speed 0 1250min impacts per min 0 5600min with 17 joules capacity concrete 20mm steel