Wire rack end(s)
Open SCAD and STL file for simply wire rack end(s). I use them to keep spools of 22g wire for projects. Nicer than keeping hidden away.
It is designed to house a 10mm dowel, which slots in nicely with a good push. There is an additional (tiny) screw hole that allows fasting the rod in place, however, I'm not found a need for it.
The SCAD file uses the Triangle library from here: