Yakima BigStack Boat Rack Top-of-the-line Hullguard padding keeps your boat protected during transport paired with heavy-duty straps with coated metal buckles protect boat and vehicle SteelCore construction uses a steel tube frame for superior strength that folds down when not in use for better aerodynamics and easier access to your garage Universal built-in hardware fits round, square, factory and aerodynamic crossbars right out of the box. Optimized for aerodynamic bars. AnchorHead tie down feature makes it easy to manage straps with multiple kayaks *Lockable with Yakima SKS Lock Cores (sold separately), Love it till you leave it, limited lifetime warranty.