Latest generation 18V XR Li-Ion Compact Impact Wrench featuring NEW XR 4.0Ah Li-Ion battery technology Ultra compact, light weight design allows for use in confined spaces Improved ergonomic design and rubber grip increase comfort and provide greater application control 1/2? (12.7mm) square socket retention for effective; efficient torque delivery in application. All metal gearing for efficient power transmission and long tool life Items Included: Fast Charger