The M12 FUEL 3/8" Impact Wrench optimizes torque in tight spaces. This lightweight yet powerful impact wrench offers up to 3X longer motor life, up to 2X more runtime, and proprietary MILWAUKEE 2-Mode Drive Control for better control over the power and speed required for specific applications. The POWERSTATE Brushless Motor outperforms with constant power output, yet runs cooler with no wearable components. The REDLITHIUM™ 2.0 Compact Battery Pack (sold separately) delivers up to 20% more power and 2X more recharges than standard lithium-ion batteries, as well as best-in-class performance in extreme job site conditions. The onboard fuel gauge helps you monitor the charge more accurately, so there’s less downtime on the job. REDLINK PLUS intelligence ensures optimized performance and protection from overload, overheating and over-discharge. The M12 FUEL 3/8" Impact Wrench provides up to 158Nm of torque. Its compact size and weight drive more control and less user exertion. The built-in LED light illuminates work surfaces in dark locations.