Multi-blow technology that virtually eliminates overdrives * DC motor delivers 650-watts of power * Drives 1- to 1-1/2-inch roofing nails * Comes with 2 20.4-volt Ni-cad batteries,one-hour charger, 2 canisters of 1-1/4-inch nails, manual, video, and case * Weighs 8.1-pounds