Designed for vehicles with existing side rails no more than 50in apart, these universal fit Apex Aluminum Roof Crossbars clamp onto your rails and tighten in place using large easy-turn knobs. They feature a 150-pound weight capacity, perfect for carrying extra luggage and other equipment on your next adventure. The clamps also have a ribbed rubber insert for increased traction and stability during travel. Lightweight and rust-proof, these crossbars are a perfect accessory for your next road trip and can be used with cargo boxes, cargo bags and roof top carriers. Cross bars mount to any car, SUV, or crossover rooftop side rails up to 50in apart Each bar measures 53.375in L x 2.125in W x 0.875in H; maximum 150 lb capacity Secures to side rails with rubber-coated clamps and easy-to turn adjustment knobs; lockable to deter theft No tools required for installation High-strength, lightweight aluminum construction