Adapter for tools to fit the cheap engravers you see getting around.
You know the ones that take 2x AA batteries and can't seem to engrave for a fk sht.

I put a Q-tip (earbud) in the thing so now the gf get's to watch me clean my ears like a maniac. Makes for some little fun for the weekends.

But hey, could be useful for some other applications.

Enjoy!