I created myself a tool tidy (see link) and as it filled the baseplate didn't have room to add a hex ket holder (Ok, might have forgotten to include it a little bit).

https://www.thingiverse.com/thing:5221984

So, I made this very simple design so it can be glued onto the tool tidy.

Thought I my as well share it here in case anyone wants it. Limited use but can be added as a hex key holder to pretty much anything.

Hex keys were the ones that come with the Ender 3, and doubtless many other printers. Hole diameters are 5.5, 4.5, 3.5, 3, & 2.5.

Creality

Ender 3

No

No

2.8

Easy print, no supports needed as long as you print in the correct orientation.