Additional Features: The Undercover Classic Tonneau Cover comes with a pair of twist-locks with keys for locking the tonneau down. The tonneau installs using a simple clamp and rail system, but is also weather-tight to keep moisture from getting into your bed.
Super Duty Bed Fitment: 2008-2016 Ford Super Duty F250/F350/F450/F550 -- Ext/Crew Cab with 6'-3/4" Short Bed (Without Tailgate Step).