Holman 4 PACKOUT Drawer Slide-Out Model 48267Holman 4 PACKOUT Drawer Slide Out Model 48267 The Holman ProStow shelving system is designed to organize and access Milwaukee Packout Storage System within a van. The slide out shelves allow for easy and ergonomic access to each unit. This set of addon shelves allow for custom configurations including the ability to have up to 6 toolboxes in one Prostow unit. Features and Benefits: Easy access to each Packout unit without having to unstack them or