Wind Noise Resistance The aerodynamic shape aluminum tube design greatly reduces wind resistance and noise, improving your driving experience. Easily Installation TANX roof rack crossbars is super easy to install and all you need is just a hex brench, which included in package,please follow the steps of installing video on detail page or the introduction manual come with package. High Grade Materials This roof rack is made of high quality aluminum alloy, which is super light-weight. However, it can hold weight reach 200lbs,and comes with one large and one small hook in order to adapt to more vehicle roof types. Unique Airfoil Shape Design Our roof rack crossbar adopted aerodynamic mainbody design, combine with the PVC strips, could greatly reduce wind noise and wind resistance during the vehicle's running process.