The M18™ Cordless Lithium-ion 3/8 in Compact Impact Wrench features a Milwaukee® 4-pole motor and powerful impact mechanism to deliver a reliable 2000 in-lb of torque for maximum efficiency and runtime. Yet, at just 2.6 lb and 5-3/4 in, it's small enough to fit in tight spaces. 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 0-2200 rpm and 0-3200 ipm with the variable-speed trigger. A 3/8 in anvil with friction ring allows quick and easy one-handed socket changes and a built-in LED light illuminates dark work surfaces. The 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 V cordless power tool offers ultimate comfort during prolonged use.