We have clamped the bar in the back corner (5cm away from the corner) our offices to approx 2.70m ceiling height and weigh it only from one side.
For our two jackets / coats and one or the other bag and scarf, the rod is strong enough. I guess it is from Aluminium..also definitely made of metal and not plastic.
She was super easy to assemble and also pinch.
The thread with the two small hooks have to draufziehen before pinches the rod, the 3 other, longer holder can clamp to the rod also in retrospect.
For better stability I have the resilient end to the ceiling, partly because the bar is shorter and narrower.
One point I draw from, because the rod could be yet more stable ... maybe. by higher diameter or wall thickness of the hollow tube.