Yakima HullRaiser Aero Rooftop Kayak Rack with Tie-Downs Foam padding keeps your boat nice and comfy while sturdy steel construction provides super boat security Universal hardware fits round, square, factory and aerodynamic crossbars right out of the box. Optimized for aerodynamic bars. Includes Heavy-Duty Straps and Bow/Stern Tie-Downs Premium heavy-duty straps with coated metal buckles protect boat and vehicle Love it 'Till You Leave It Limited Lifetime Warranty.