UWS Fender Well boxes mount over the wheel wells and make use of all of the available space in an area not often used. These boxes open toward the center of the bed and have a center locking/latch and have a full-length piano hinge for strength. Choose from Driver (D) or Passenger (P) side units. (TIP: These boxes can be mounted in front of the wheel wells on Full Size Long Bed pickups if you don't use a cross box. These make excellent storage units for 5th wheel trucks applications.