From the designer:
This is a custom insert that I have designed to fit your Milwaukee Packout to store your Gen 3 M12 Drill & Impact Driver. It specifically fits the Milwaukee 48228435 PACKOUT Compact Organiser.
The specific M12 Drill and Impact models that this is designed for is model 3404-20 & 3453-20, links are provided here:
https://www.milwaukeetool.com/Products/3403-20
https://www.milwaukeetool.com/3453-20
BELT HOOK NOTE:
There are two variations of this design that are provided for you to pick from. One is the standard version (which is seen in the photos above) and the other is a mirrored version. The standard version accommodates your tool if you have your belt hook attached on the same side as what is seen in the photos above (the left side when holding the tool)
The mirrored files accomodate users who instead have their belt hooks mounted to the opposite side (the right side when holding the tool). This way, you can pick the file that insures that your belt hook is facing upwards when placed in the Packout.
I've done this so that I could maximise the height of extra storage that is hidden underneath the tools and allow for even more storage of extra kit.