Prorack Aero bars aren't just great looking, their low-profile shape makes them quiet and very fuel efficient. They fit onto your vehicle easily and you can add an accessory like a bike rack in no time thanks to the built-in t-slot. Locks are included for extra peace of mind. Choose the rail mount for a style that's designed to look great and blend in with your vehicle with roof rails. Features Low profile shape for low noise and fuel efficiency T-slot makes adding accessories a breeze Rail mount is designed for vehicles with roof rails Locks securely Simple to install