Those looking for the best rotary hammer drill for concrete won't be disappointed by our lineup. We've got the 1â SDS-Plus Rotary Hammer Drill, with or without the rubber D-handle, and also the 1-1/8â Rotary SDS-Plus shank. We also carry 1/2â hammer drills in a cordless version as well as the cordless 1â hammer drill SDS-Plus. This unit accepts two 18-volt batteries for a total of 36 volts. All the roto hammer models feature variable speed and reverse plus three operation modes â rotation only, hammer only, and rotation and hammer. These impact drills for concrete are awesome concrete drilling machines that utilize special low-vibration technology, as does the 42-lb concrete demolition hammer and the 70-lb Breaker Hammer Kit.