Side-rail tool boxes sit on the side rails of the truck. These truck side tool boxes are most often used by contractors, and they can provide quite a bit of extra storage, depending on the size.

THESE SIDE RAIL MOUNT BOXES are available for pickup trucks in high and low profile configurations. THESE SIDE RAIL MOUNT BOXES are available for pickup trucks in high and low profile configurations.

That said, at $99.85, it's on the more affordable side of wheel well tool boxes. FGJQEFG 34.5-Inch Aluminum Truck Bed Tool Box With a height of just 6.5 inches, the FGJQEFG Truck Bed Tool Box is ...