The Pro-Angler Series line is feature rich and is designed with extra storage and maximum carry capacity in mind. Tackle bags in this line have a collapsible expansion pocket on the back that can hold 2 extra trays and have Flambeau’s Zerust tray technology. This bag will hold up to five 4007 Flambeau Utility Boxes with Zerust Dividers (3 Utility Boxes are included). The main compartment holds 3 Utility Boxes. It s loaded with functionality and features that include a big mouth main compartment opening diamond gusset mesh plier holster padded carry strap mesh zippered top pocket and exterior zippered pockets.