Milwaukee M12 Cordless 3/8'' Square Drive Impact Wrench Kit: MLW2451-22The kit includes two M12 batteries, an M12 lithium ion 240V battery charger and a carrying case. An easy socket insertion release and 3 8 anvil with friction ring allow for quick one handed socket changes, and a built in LED light illuminates dark work surfaces. The on board, real time battery fuel gauge helps you monitor the charge precisely, so theres less downtime on the job. Lightweight and portable, with superior ergonomics, this 12 volt cordless