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 all leading competitors 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 jobsite 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.