2 Piece Universal Vehicle Car Roof Mounting Rack Rail Bar Aluminum Luggage Carrier with Lock Car Rack Product type and build: two cross bars made of rustproof aluminum for a universal roof rack system with a lockable , designed to increase vehicle cargo capacity without adding excessive weight. Material and weight: aluminum construction provides a lightweight solution that minimizes impact on your vehicle while resisting corrosion. Aerodynamics and quiet ride: the aerodynamic cross bar design reduces wind resistance and noise during travel, helping to maintain a smoother and quieter ride. The bars leave clear space under them for sunroof operation. Durability and weather resistance: engineered to withstand heavy loads and harsh weather conditions, delivering reliable performance across outdoor trips and changing seasons. Compatibility and security: designed for universal mounting on a wide range of vehicles with roof rails or compatible mounting systems; includes a lockable to help deter theft of the rack and cargo. Key specifications: material is aluminum; includes 2 cross bars; universal fit for most vehicles; lockable feature for security. Practical use scenarios: Road trips and family travel: add luggage, boxes, and bulky items to interior space. Camping and outdoor trips: carry tents, sleeping bags, chairs, and other bulky gear. Seasonal equipment transport: support skis, snowboards, or other sporting gear with appropriate accessories and mounts. Easy integration and maintenance: simple setup on compatible roof racks; rustproof surface and easy cleaning help maintain appearance and performance over time.