Featuring REDLINK overload protection electronics in the tool and battery pack to deliver best in class system durability, this tool is a compact 3/8inch impact wrench that measures 152mm in length to make it perfect for working within confined spaces. Designed with the flexible battery system that works with all Milwaukee M18 batteries, REDLITHIUM-ION batteries gives up to two times more run time, 20% more power and two times more battery life. The battery also operates better at -20°C, than any other lithium-ion batteries.The individual cell monitoring optimises tool run time to ensure long term durability, whilst the heavy-duty full metal gearbox and gears provide superior durability and maximum torque.With 3/8 inch square drive to allow for use with universal sockets, this tool also has an on board fuel gauge and a LED light, whilst its individual cell monitoring optimises tool run time to ensure long term durability.