Jobox PAN1441000 48 1/2" Aluminum Innerside Truck Box Gear-Lock Self-adjusting Dual Rotary Locking System always latches and closes for superior security Self-aligning Latch Pins pivot from side-to-side to engage with the Gear-Lock System. no adjustments required High-Strength RSL Laminated 3-Layer Rigid Structural Lid is the strongest, most rigid aluminum lid we've tested Reinforced high-Strength Body and Full-Width Lock Console resists cargo damage and protects the lock system Heavy-Duty Guards protect the vertical-action gas spring lid lifts and help ensure long-term durability Built in full length storage compartment Mounting kit includes support legs and hardware Self-centering latch pin High-strength body design Inner sides help keep the bed free