It specifically fits the Milwaukee 48-22-8424 PACKOUT Toolbox. 

https://www.milwaukeetool.com/Products/Storage-Solutions/PACKOUT/PACKOUT-Tool-Boxes/48-22-8424

Features - Super Flexible Design

• Efficient Storage - Store and sort your 150mm orbital sanding pads like never before! 6 dedicated spots are available for all your storage needs. Additional tub storage is available surrounding the 6 slots for your smaller items.
• Grit Sorting - Jonah designed a fully custom system to label and sort your different grits of sandpaper. This allows you to store multiple different grits in a single slot! The divider consists of a disc that sits between the pads which has a handle attached. This handle allows for easily lifting out your chosen sandpaper.
• Grit Labels - Fully modular labels are included that slot into the handle of the dividers. You can see these above as they are printed in red for the photos. Choose your amount of handles & GRIT labels
  Labels available: 40, 60, 80, 100, 120, 150, 180, 220, 240 and 400 Grit sandpaper (Contact me for custom values)

*Milwaukee PACKOUT and any tools pictured are not included, product for sale is the insert only!

This is a 3D printed product, layer lines and small artefacts may be visible, this does not affect the functionality of the product.

FREE standard shipping applies to orders within Australia based on the following conditions:

Spend $80+ on products
(*excluding tool inserts)

OR

$120+ when including tool inserts

All orders are sent using Australia Post