DeWalt DCK277D2 Drill/Impact Combo Kit vs DeWalt 20V MAX XR Hammer Drill Kit

Buy the DCK277D2 combo if you need both a drill and an impact driver, since it covers drilling, driving and fastening in one kit with two batteries. Buy the DCD805P2 if you drill into masonry or concrete, because it is the only one of the two with a hammer function. The combo's impact driver delivers far more fastening torque, while the single hammer drill is the more capable drill on hard material. Owners of both lines praise the brushless motors and build, and DeWalt's 3-year limited warranty applies to either.

• Choose the DCK277D2 combo if you want a drill and an impact driver in one kit, with two batteries, for general building, assembly and driving long screws.
• Choose the DCD805P2 if you drill into brick, block or concrete and want one compact hammer drill with a large battery.