GatorTrax Retractable Tonneau Truck Bed Cover  2009-2014 Ford F150 5.5 ft Bed Fits Only - GatorTrax Retractable Tonneau Truck Bed Cover 2009-2014 Ford F150 5.5 ft Bed GatorTrax slides back and forth by hand on sealed ball bearings. It can also be key locked in any position. Constructed out of LEXAN which is a lightweight, impact-resistant material Sealed Ball Bearings require Zero Maintenance and will never freeze. Made in the USA - Limited Lifetime Warranty