It was created for the Sparkfun singel relay module, which measures 58x27. Even with a layer height of 0.3 and PETG, it fits well.
The board slips in and is designed with header pins soldered on. A M3 screw and an M3 nut were used to secure it.
It is designed to be used with a DIN-35 rail.
Reccomend using DIN rail clip unlocker from HD_Creator to release the mount from the DIN rail.
The author marked this model as their own original creation.