Extang Blackmax Truck Bed Tonneau Cover | 2475 | fits Ford F150 (5 1/2 ft bed) 15-18 Snaps Along the Entire Perimeter. Access Anywhere, Anytime Spring Loaded Bows for Quick Removal SnapStoppers Keep Snaps Secure When Tarp Is Rolled For Hauling Instantly Secure And Release Tail Rail With No Tools Adjustable Bows and Snaps Keep Tarp Tight In Any Conditions