Get superior socket retention in a powerful, compact, long-running impact wrench. The M18 Cordless Lithium-ion 1/2" High-Torque Impact Wrench features a Milwaukee. 4-pole motor and powerful impact mechanism to deliver a reliable 450 ft-lbs of torque with maximum runtime. The REDLITHIUM Extended Capacity Battery Pack (sold separately) delivers more work per charge and more work over pack life than the competitors, as well as best-in-class performance in extreme jobsite conditions. You'll get consistent speed control between 0-1900 RPM and 0-2200 IPM with the variable-speed trigger. The 2662-20 has a 1/2" anvil with detent pin to ensure maximum socket retention. The M18 Impact Wrench's onboard, real-time battery fuel gauge helps you monitor the charge precisely, so there's less downtime on the job. Lightweight and portable, with superior ergonomics, this 18-volt cordless power tool offers ultimate comfort during prolonged use.