"Powered by lithium-ion technology, this Milwaukee Impact Wrench delivers best-in-class fastening speed. Its compact size reduces fatigue without sacrificing power. 3/8in. anvil with friction ring offers quick and easy one-handed socket changes to increase productivity. Tool Weight lbs. 4.1, Charger Included Yes, Drive in. 3/8, Volts 18, Impacts Per Minute IPM 0-3,200. Milwaukee 4-Pole frameless motor for maximum efficiency and run time Built-in LED light illuminates work surface Heavy-duty die-cast aluminum, gear housing"