This is a ridiculously simple thing. It is intended to keep things from sliding on a closet rod.I made this a long time ago, but finally figured I'd put it up in case it could be useful to someone else.These could be useful in the closet of a motor home or trailer, or maybe for organization in a home closet.I made this to help feed plastic to my printer. In my basement home-office, I have a closet rod hung up between rafters on which I hang my filament to feed to the printer below. These clips go between the spools to keep them from sliding around or rubbing against each other and creating friction.The STL presented here is for a 1.25 inch diameter closet rod. If you need a different diameter, just tweak the ir (interior radius) variable in the scad file for what you need.