The M18™ FUEL™ high torque impact wrench is the most powerful 18 V cordless impact wrench in its class. The PowerState™ brushless motor outperforms all leading competitors with constant power output, yet runs cooler with no wearable components. The REDLITHIUM™ XC5.0 battery pack delivers more work per charge and more work Over pack life than the competitors. The onboard fuel gauge helps you monitor the charge more accurately, so there's less downtime on the job. Redlink PLUS™ intelligence ensures maximum performance and protection from overload, overheating and over-discharge. The 1/2 in pin detent anvil offers users superior socket retention. A new contoured soft-grip gives you ultimate comfort during prolonged use.