We produce the Car Roof Bars with high tensil stength aluminum material. The Car Roof Bars are installed onto the roof rails. Some of our Car Roof Bars come with a lock on the foot or bar and with adjustable width for snug fit;Some come without lock. Our Car Roof Bars' load capacity is from 50kgs to 120kgs. Not only the SUV can install with the Car Roof Bars; Many cars can be also installed with the Car Roof Bars. Each connection of the Car Roof Bars are different and their installation ways are always different,too.