Thule Roof bar systems are typically composed of three components. The Rails, The footpack and the fitting kit. The rails are the horizontal bars that allow carriage of luggage, roof boxes, bike racks etc... The footpack is the component that attaches to the roof rails and allows the rails to be fixed to the roof of the vehicle. There are several different Thule footpacks to suit different roof designs such as cars with luggage rails, cars with flush rails, cars with threaded fixing points or cars with no fixing points. The Fitting Kit clamps the footpack to the roof of the vehicle. As there are many different roof designs, the fitting kit is required to securely fix the roof rail system to your specific vehicle. Please check the Thule online buyers' guide to ascertain which fitting kit you require for any given vehicle, bar and footpack combination Each kit contains enough to applicate 1 vehicleThe kit is designed for the perfect fit to a particular car model, which results in maximum safety and ease-of-useFitting of the kit is done with the aid of a fool proof systemPlease note that the kit you receive may vary in appearance from the example image shownAll Thule products come with a 5 year warranty