Retrax 60841 ONE MX Retractable Truck Bed Cover | fits Tundra CrewMax 5.5' Bed with Deck Rail System (07-up) Opens and closes easily with our exclusive use of sealed ball bearings Featuring one-piece polycarbonate construction, a low profile design and a tough matte finish that resists scratching Lockable in any position - Secures your valuable cargo or stays open whenever and wherever you need it Unlimited hauling flexibility - Great for 5th wheel towing. Improves mileage by up to 10% UV Protected; No Fading, No Maintenance