Impact drivers use higher speeds then an Impact wrench. The higher speeds create a bit lower torque so when using it for fasteners like deck screws, they don't snap off. With that said they still on average make 3X the torque of a standard Drill, allowing you to work faster. ToolKing.com offers a great selection of Impact Drivers at the web's lowest prices. Browse our current selection of Impact Drivers from the top brands including Chicago Pneumatic, DeWalt, Makita, Bosch, Milwaukee, and many more!