This is a very spacious toolbox for all the essential tools you need and more. I designed the holder separat to limit the need for supports. This also comes with the benefit, that you can easily reprint it, if it comes lose over time.

The holder was designed with enough clearance for the X-axis gantry. (See picture: clearance)

Decide which way you want the toolbox to face!

Design was inspired by TheClarkJB´s "Prusa MK3 Tool Holder" but I designed it myself. I wanted to have a bigger toolbox for pretty much all my tools. Check you TheClarkJB´s tool holder here: https://www.thingiverse.com/thing:3060616

Prusa

I3 MK3S

Doesn't Matter

Yes

0.3 for the toolbox // 0.2 for holder

15 for toolbox // 100 for holder

I recomend PC-ABS or Nylon for the holder because I encountered some plastic deformation with PLA+ over some time. It will work with PLA or PLA+ if you don´t have these techy materials or the means to print them.

For the supports, I´d recomend using paint-on supports otherwise your slicer might generate supports for every hole, which isn´t at all necessary.

Remove the brim from the holder and put a few drops of super glue on the holder, before attaching it to the toolbox. Don´t overdo it with the glue to make removing the holder easire, in case you want to reprint the holder some time later.

You need quite some force to attach the whole thing to the printer frame.