The Revolver X2 hard rolling truck bed cover features exclusive automatic rotational locking rails that secure the cover the entire length of the bed on each side. This hard aluminum roll-up cover easily rolls up with one-handed operation and allows use of every inch of the truck bed without blocking your rear window. This cover does it all with unrivaled strength, security and style.\nRevolver X2 Hard Rolling Truck Bed Cover - 2017-2021 Ford F-250/350/450 6' 9 Bed\n2017-2021 Ford F-250 Super Duty 81.9 Bed, 2017-2021 Ford F-350 Super Duty 81.9 Bed