BCI Fabrication Steel Chest Truck Toolbox TB18-48BCI Fabrication Steel Chest Truck Toolbox TB18 48 BCI toolboxes feature a heavy duty 12 gauge steel construction, cross broke lid, Line X Polyurea coating, and removable tool tray. The cross break on the lid helps to strengthen the lid and to shed water and mud. The TB18 48 is a great option for when you need a lot of storage in a small space. This toolbox is narrow enough to fit between the fender wells in the beds of most trucks, but it isnt so tall