Customization of Arbitrary hex (Allen) key holder to fit the keys included with the Original Prusa i3 MK3 Kit.
I printed using the then-supplied filament (Prusa Silver PLA, not Prusament) with the default profile for 0.20mm layer height, except I turned off infill because it was unnecessary.
One of the holes was a bit tight but they all fit okay once I got the keys in the first time and it's lasted a year and a half of light use since then.
The author hasn't provided the model origin yet.