The DEWALT DCK233P2 20V MAX* XR Brushless 1'' SDS Plus Rotary Hammer and Impact Driver Kit consists of a DCF887 20V MAX* 1/4'' Impact Driver with a DCH133 1'' SDS Plus Rotary Hammer. The DCF887 Impact Driver is designed with a DEWALT built Brushless motor and XR Li-Ion batteries which deliver more run time and capacity over standard units. The DCH133 Rotary Hammer features DEWALT electronics which allow the tool to maintain speed through the entire application without bogging down even with the largest bits. The optimized 2.6J mechanism provides faster than corded speed-of-application. Durable German engineered mechanism for long service life, even in the hardest concrete. Its compact size allows access to space restricted areas and 4.0 Ah packs provide all day run time.