Sometimes just fancy those plumbers' milwaukee gear? Now even you are not on Milwaukee's platform, you can buy that skin you'd fond and clip this on, bang!

Or when you come across some second hand cheap milwaukee gears and don't want to miss that bargain coz you are on other brands. Don't think, buy first, ask later, always. This little gadget will take care of the rest.

It also comes with 1 year warranty for itself, and tax invoice with which you can claim your percentage back. 

Disclaimer: all adaptors can only be used between your tools and batteries, they are not designed to be used with the charger. And logically if you got the charger, you should get the adaptor the other way around right? :)