54" Heavy Duty Aluminum Adjustable Roof Cargo Bar Pair Fits Roof Side Rails Increases available vehicle cargo storage space by converting existing roof side rails into a cross-bar style cargo rack Aluminum Roof Rack Cross Bars With Adjustable Clamps & Locks Comes With Built-In Lock & Key to Secure Things Slide Off To The Side-Adjustable clamps for desirable length-Fit most of the vehicles with existing roof side rails Each bar features a 5/8"W ribbed rubber insert for additional cargo grip, heavy duty aluminum construction with a maximum 150 lb. capacity Application: Universal Fit For Vehicles With An Existing Roof Side Rail System ( Do Not Fit Flush Mounted Or Round/Oval Shaped Roof Rails And Do Not Fit Factory Rails If The Height Is Over 1 1/2 Inches. Please measure the dimension of your factory roof rail to make sure our clamps is big enough to fit your application )