Ptimized 2.6J mechanism of the cordless hammer drill provides faster than corded Speed of Application Dewalt electronics allow Dewalt 20V hammer drill to maintain speed through the entire application without bogging down even with the largest bits. Durable German Engineered mechanism of Dewalt 20V brushless hammer drill is made for long service life, even in the hardest concrete. Compact size allows access to space restricted areas. Tool only.