This mobility kit fits the Laguna Revo 18|36 Lathe (sold separately). It consists of four swiveling casters and dual gas struts, which raise and lower the lathe onto or off of the casters. Because the lathe rests on all four pads when in use, you'll enjoy maximum stability. Dual gas struts make raising and lowering smooth and easy. All four swiveling casters are engaged for maximum maneuverability.