Delivering 450 ft-lbs fastening torque and 600 ft-lbs nut-busting torque, the M18 FUEL 3/8 in.mid-torque impact wrench is the most powerful 3/8 in. impact wrench in the industry. The POWERSTATEbrushless motor delivers up to 0 to 2,300 RPM resulting in increased productivity. REDLINK Plusintelligence is the most advanced electronic system on the market, preventing damage to the tool and battery caused by overloading or overheating. For use with REDLITHIUMcompact batteries or extended capacity batteries (sold separately), the M18 FUELmid-torque delivers more work per charge and more work over the life of the pack than competitive batteries on the market. The 3-mode DRIVE CONTROL provides greater control over output speed and power for greater versatility. At 6.7 in. in length and 5.3 lbs with a 5.0 Ah battery, the M18 FUEL1/2 in. mid-torque impact wrench delivers the balance and weight desired by professionals for all day use. This tool offers quick, tool-free socket changes with a 3/8 in. friction ring anvil. The anvil provides the most durable solution allowing users to work longer than any cordless competitor in its class. A premium rubber overmold material gives you ultimate comfort during prolonged use while lasting longer against corrosive materials.