Needed something to prevent my cat Ranger's bed from sliding of the shelf. Designed this after a few revisions and have been using it for a few years at this point. The circular part acts as a spring to increase its strength. It's actually pretty sturdy, definitely enough to prevent the cat bed from sliding. But it should go without saying it is still plastic and isn't going to stop something like a person from rolling off a bed.

There are holes on both ends should you decide to flip it for your application. The holes can also be used to attach crossbars between the brackets.

The more infill or walls the stronger it will be. I did 4 walls and 50% infill with a 0.4mm nozzle.