Swivel Towel Bar

I was getting irritated by the always sagging swivelling towel bar next to my sink in the bathroom. So I decided to design a replacement.

This is a single towel bar that swivels horizontally.
It was designed in OpenSCAD and in printed in neutral PLA.
There is a single 4 mm flathead screw holding it to the wall. The base of the bar is held by a 6 mm bolt and nut.
The base is designed to hold a bolt with allen head. The underside is cut out for the nut to be held in place.

For a bar I used a piece of 10 mm aluminum tubing from the hardware store.
The tube is plugged in front with the plug which is also incorporated in the design.