Delivery again quickly and swiftly with Amazon. Unfortunately, we do not believe the roof rack as the Allen screw for adjusting the clamping shoe is very difficult to access and the enclosed Allen key must be pushed obliquely upward into the holder, so you can reach the Allen screw at all. In addition, "some" rotated by this handling of Allen quickly because it does not pack properly. Sorry, no buy recommendation, we sent the carrier back.