This twin pack includes the DCD805E2T Brushless Combi hammer drill + 2 x DCBP034 Powerstack Batteries that come in a Tstak case, also paired with the Dewalt 18v XR Multi Tool DCS355N Features Improved Transmission which Supports the increased power levels Increased power and performance Reduced Length/More Compact, 13mm/6.6% shorter (DCD805vDCD796) which gives enhanced ergonomics More Power, Efficiency and Durability, 80% more power density v DCD796 giving increased power and faster application speed An incredible 90Nm driven through the new/improved transmission.