KT Pro Tools A8401MP 1" Drive Impact Socket Set 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 1 inch Drive Impact Deep Thin Wall Sockets 6 point 24, 27, 32, 36, 38, 41 millimeter, Drive Impact Rear Wheel Sockets 4 point 17, 21 millimeter