TTSR - The Tougher Safety Ring (door opener)

This is not my original design but merely a remix. The original has been removed from the net by its author, though.

The Original by LeonWoodman was, without a doubt, one of the most nicely designed iterations in that ocean of more or less useful no-touch tools thingiverse has been flooded with at that time.

I decided to modify it a little for toughness, though. It is using a 16x3mm screw and a cheap M3x3x4.2 brass nut insert.

I also made some smaller modifications to ease assembly even a bit more.

I printed this in ABS+. No supports, rafts or fan required.