The Mayhew Tools ProPneumatic 5/8" Pin & Rod Driver, No. 32039, is designed for driving rounding rods, large pins or bolts in electrical applications. This tool features a standard 0.401 Turn Type Parker shank. Made of shock-resistant alloy steel that is fully hardened and tempered, the pin and rod driver offers a black oxide finish that helps prevent corrosion and promotes long-lasting durability. This tool is made in the USA and backed by a lifetime warranty.