Nilight roof rack cross bars are made from high-grade aluminum, which is extremely strong and durable. The anti-theft lock design can improve safety, and the rubber pad can prevent scratches during installation. These are quick and easy to install, just follow the instructions and you'll be up and loading your belongings in no time. The length of our crossbar is adjustable, just loosen the screws at one end and move the base to the length you want.