The Snap-on 10-pc Bearing Race and Seal Driver Set is available in Steel (No. A1310SB) and Aluminum (A1310B), allowing to match the disc with the appropriate job. This driver is suitable for use on transmissions, rotor assemblies, axles and wheel bearing replacements. The crown-shaped, 9-1/2" handle with striker cap is designed to offer improved access and keep hands farther from component contact. The patent-pending, fastener-less ball-detent design eliminates using and/or losing screws when attaching discs, increasing speed and safety in race and seal replacements, the company says. With nine steel or aluminum discs, the A13010SB fits most common bearing races and seals.