Long, narrow and sleek, Yakima's SkyBox 21 safely totes your gear. It sports a rugged and spacious design and a smooth, aerodynamic profile. Plus, with no-assembly, rapid-fire mounting hardware and dual-sided, spring-loaded openings, it's easy to get this box on and off, and opened and closed. The universal mounting hardware fits round and square crossbars, plus many factory racks, too.