The next time you need to drive fat lag screws or loosen large, corroded nuts, retire your ratchet wrench and reach for the DEWALT DC820KA Compact Impact Wrench. Driven by an 18-volt XRP extended-run battery, the -1/2 -inch-drive, variable-speed wrench delivers both rotation (0-2,400 RPM) and concussive blows (0-2,700 BPM) directly to the fastener. The result is an impressive 1,740 -inch-lbs. of turning force. Other features include: compact, lightweight - just 4.6 lbs. - design; frameless motor with replaceable brushes; textured, anti-slip grip; all-metal transmission; heavy-duty magnesium gear case for smooth operation; and a unique impact mechanism that reduces kickback and directs all that torque to the fastener. DC820KA Cordless Impact Wrench comes with two 18-volt XRP batteries, one-hour charger and storage case. It’s backed by DEWALT’s three-year limited warranty, 90-day money-back guarantee, one-year free service contract, and two-year free service contract on the batteries.