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The DeWalt DCF840D1 is a 20V MAX brushless 1/4 in. impact driver kit with a battery, charger and belt clip. Its brushless motor delivers up to 1,700 in-lb of torque and 3,200 RPM, and a compact body helps it reach tight spots. A 3-LED light illuminates dim work areas. It suits homeowners and tradespeople who want a light, powerful driver for large screws and deck work; rivals in the same class trade some torque for smaller size or add multi-speed modes.
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Lowest price we've seen: $98.43 on Nov 13 at eBay. Tracked across 9 stores since Nov 13.
Owners rate it well overall, praising the torque and light weight for the power. Some note the lack of speed settings and the size compared with smaller drivers.
The DeWalt DCF840D1 is a 20V MAX* brushless cordless 1/4 in. impact driver kit. It is designed to be lightweight and powerful. The brushless motor delivers up to 1,700 in-lb. of torque and up to 3,200 RPM for driving large-diameter screws.
The compact design is made for easy handling and access to hard-to-reach spots. A variable speed trigger gives control and precision. An on-board 3-LED work light brightens dimly lit workspaces.















