The compact ½″ impact wrench measures 155 mm in length, making it ideal for work in tight spaces. The powerful 4-pole motor delivers maximum performance while maximizing power-to-weight ratio. The Redlink overload protection electronics in the tool and battery pack provide the best system lifespan in its class. A robust all-metal gearbox and gears ensure superior durability and maximum torque. The ½″ square drive is suitable for use with universal sockets. Monitoring of individual battery cells optimizes the tool's runtime and ensures a long battery life. A fuel gauge and an LED light are included. The Redlithium battery pack offers superior pack construction, electronics, and fade-free performance to deliver more runtime and more work over the lifespan of the pack. The flexible battery system is compatible with all Milwaukee M18 batteries.