The DHR243z replaces the BHR243Z SDS Features of the DHR243Z The DHR243 includes a Quick Change Chuck Able to drill in concrete as fast or faster than 24V Cordless Combination Hammer model BHR200. One touch slide chuck for SDS-plus bit. Easy-to-grip handle ergonomically designed to: give maximum power thrust. provide a sure and comfortable grip in any operation; overhead application, drilling with palm-up or palm-down grip. 3 mode operation Rotation + Hammering Hammering only Rotation only The tool body is seperated into the upper and lower housings at the foot of handle portion where the houses are jointed with vibration absorbing cushion rubbers. Higher productivity than model BHR202 achieved by using efficient Brushless DC motor to reduce energy loss .