It specifically fits the Milwaukee 48228435 PACKOUT Compact Organiser.

The specific M12 Die Grinder that this is designed for is model M12FDGA-0, link is provide here: https://www.milwaukeetool.com.au/power-tools/metal-working/die-grinders/M12FDGA-0.html

Here's a full list of the batteries that are compatible:
Standard M12 Batteries: 2.0Ah, 3.0Ah, 4.0Ah & 6.0Ah
(I was unable to source one of these but as best as I could determine, the 6.0 uses the same shell/housing as the 4.0, so it should also fit)

High Output M12 Batteries: 2.5Ah & 5.0Ah

*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