The ProMAXX PowerDrive, No. PMXPDT250, is a small device designed to turn any 1/4” air or electric ratchet into a powerful torque filled drill. The tool accessory attaches to any 1/4” drive and accepts threaded shank machine drill bit tooling. It comes with one .125” cobalt precision tooling bit with additional sizes available. The PowerDrive provides technicians with increased access to tight areas such as exhaust manifold repairs that fall behind the shock tower in Ford Trucks and under the firewall of GM, as well as offers more accurate and precise tolerances than traditional drill chucks, the company says. It's made from American-made steel.