A Skid loader or skid-steer loader is a rigid frame, engine-powered machine with lift arms used to attach a wide variety of labor-saving tools or attachments. Skid-steer loaders are four-wheel drive vehicles with the left-side drive wheels independent of the right-side drive wheels. By having each side be independent of the other, wheel speed and direction of rotation of the wheels determine the direction the loader will turn. Skid-steer loaders can turn in their own tracks which makes them extremely maneuverable and valuable for applications that require a compact, agile loader.