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