The Milwaukee M18ONEFHIWF12-502X 18v 2x5.0Ah Li-ion Fuel 1/2in Friction Ring Impact Wrench Kit is a M18 One Key High Torque Impact Wrench which has increased productivity with faster removal speed making it ideal for professional use and DIY enthusiasts alike. Fasteners can be now removed over 2x faster than other competitors in the market. The Wrench was designed to be compact and is actually about 18mm shorter in length than any similar product from competitors, this provides better access in tight spaces. One Key functions include security, tracking and customization. This Impact Wrench comes with two 5.0Ah batteries, a charger and a carry case.