Description The Milwaukee PACKOUT Tool Tray (48-22-8045) features Stack or Store functionality. Stack the Tool Tray onto any PACKOUT⢠solution, or store within the PACKOUT⢠Rolling Tool Chest, Rolling Tool Box, XL Tool Box, or the Large Tool Box. This tool storage tray allows users to customize its internal layout with Quick-Adjust Dividers creating up to six separate storage compartments.