"Prepare your vehicle for overhead cargo storage with Apex Aluminum Locking Roof Cross Bars with Straps. Manufactured from high-strength, lightweight aluminum, these cross bars will never rust and will hold up well in all elements. They can support up to 165 lbs, evenly distributed across both bars. They install easily - an adjustment tab inside the housing tightens or loosens the strap to fit the side rails, then is secured by locking the housing in place. They adjust to fit side rails spaced 33-1/2"" to 45"" wide, measured from the center of the side rails. The center rubber grips can be removed to allow T-bolt accessories to mount right to the crossbars."