These Car Clips allow any Rightline Gear Car Top Carrier to be used on vehicles without a roof rack. Add the clips to the ends of the standard straps included with any Rightline Gear carrier and attach them to an available ledge along the vehicle"s door frame. On most vehicles, the best ledge is found under the door mounted weather molding. The coating on the metal hooks prevents any damage to the vehicle. Please note: The Car Clips are included with the Sport Jr Car Top Carrier and the Car Top Duffle Bag.