ROLA Roof Racks, Removable Mount REX Series are made from the highest quality materials. They are available with anodized aluminum cross bars, high strength molded nylon and stainless steel hardware for long life. These aerodynamic crossbars are created to minimize drag and wind noise. Rola roof racks are easy to install or remove and most of them are fully lockable. There is no better way to haul your extra gear on a road trip than on your vehicle's roof.