BCI Fabrication Steel Crossover Truck Toolbox Double Lid Model TB10BCI Fabrication Steel Crossover Truck Toolbox Double Lid Model TB10 Front Storage Cage Is Not Included. Please contact us if you would like to add the optional storage cage to your order. BCI toolboxes feature a heavy duty 12 gauge steel construction, cross broke lids, Line X Polyurea coating, and removable tool trays. The cross break on the lids helps to strengthen the lid and to shed water and mud. The TB10 comes standard with side mounting rails to