Roll N Lock A Series XT Locking Retractable Truck Bed Cover for 15 20 Ford F 150 5' 7" Bed Model 101A XT 1100 and an included concealed vibrator 2006 and an included concealed vibrator that allows it to spread bulk salt or a 50 50 sand salt mix from 3 4 ton and 1 ton trucks LEGEND EconoLite Door Liner ONLY Dual Doors Ford Transit (all Wheelbase lengths) High Roof Textured Grey Model 07F00 20 H This retractable cover is constructed as a single piece with hidden seals to keep water out of your truck bed and your cargo protected from the elements The Roll N Lock A XT provides you effortless full bed convenience while not missing the mark on impeccabl e security