Abstract: A bar system for attachment to the box of a pickup truck for securing various items in the box in a stabilized manner. The bar system includes (a) an elongated bar which includes an elongated slot, (b) mounting brackets secured to opposite ends of the bar, with at least one of the brackets being adjustably mounted, and including a bolt for securing each bracket to the box; and (c) at least one tie-down bracket carried by the bar and being movable along the bar. The bar system strengthens the box and also provides convenient and safe tie-down locations to secure and stabilize items carried in the box.