Extang Revolution Roll-up Truck Bed Tonneau Cover | 54801 | fits Toyota Tundra (5 1/2 ft) 07-18 (with rail system) An Incredible Roll Up Tonneau Cover With A Revolutionary Design Automatic Tension Design For Quick Latch And Go Operation Provides A Stylish Near Flush Fit Side Rails Are Pre-Drilled for Quick and Easy Clamp Placement Automoatic Tension System Keeps Tarp Tight And Looking Great