The Toolbox covers have all aluminum construction, roll up bars and bows and UV resistant double coated vinyl fabric, The XT-DIAL tension adjusters let you hand tune the tarp tightness with a few easy turns, no complicated springs, levers or tools needed, The smooth 1"" hook and loop running the full length of the bed mean there are no snaps or debris catching tracks to get in the way, Real world tested and approved, the unique design fits effortlessly behind an over the rail toolbox, The Access toolbox cover also keeps your cargo secure and protected with its automatic latching system and manual slide lock, Model specific clamps make installation fast and easy, Equipped with all the great features of the Access Roll-Up Cover, Will not interfere with toolbox operation, Cover rolls up compactly to fit behind the toolbox, SKU: AGR568