KT Pro Tools D5373P 3/8" Drive Impact Universal Joint with Ball High quality chrome molybdenum steel with precision impact-grade, heat-treated phosphate finish Available in: SAE and Metric, 6 and 12 point, 3/8 inch drive to 1-1/2 inch drive Standard, deep, bit, thin-wall, rear-wheel, and racing impact All impact sockets and impact accessories fit great with Mighty-Seven (M7) Impact Air Wrenches 2 inch