I had a home made shoe rack, made out of 25mm wooden rods that we no longer used. So I made these connectors to rebuild the rods into a cloth rack. This was my first project in Sketchup and I'm not very used to 3D modeling. :)

The rods I have are 25mm in diameter and the connectors are 26mm, therefore I hade to drill and screw them after printing. I gave it a try to make screw holes in the print, but gave up.