Information about the product Details: Intended for vehicles without pre-installed raised roof rails. Streamlined elliptical shape to reduce wind drag. Each bar has 2 locks (with keys). Metal brackets attach under the door recess. The T-slot channel enables simple installation with added durability and minimal air resistance. Ratchet tensioners for easy adjustment. Always make sure the bars are securely installed before driving. Compatible with 4 or 5-door cars only (not suitable for 3-door cars, vans, or large SUVs).