The 1A Raingutter Towers keep a solid grip on any raingutter. Attaches to vehicles with raingutters, or to camper shells and caps with brackets. Adjusts to non-parallel raingutters with the option of lockable SKS cores, sold separately. Towers are made from tough Zytel (tm) nylon. Set contains 4 towers. Click on the link above to access the Yakima Fit List to determine the clip that fits your specific car.