Originally made to hang a spool of packing paper underneath my workbench for easy access. This model is a very generic rod holder that I've found a couple other uses for since.
I don't think there is a correct orientation for the rod holder. Typically one would want to print a “hook” on it's side to align the layers with the force. However, the rod hole would be weakened in that orientation. I decided to print it flat to avoid supports and trust in the layer adhesion of PETG and the power of heavy infill.
The author marked this model as their own original creation.