Again, pret-ty specific, but hey, we're sharing here :)
This is a hook I made to mount an old school fly screen that didn't come with any materials whatsoever to actually attach it above the door. Once printed normal and once mirrored.
I know not many people will have the same exact fly curtain (also I don't remember the brand name), but it might give someone an idea.
I am Baschz, an artist and designer from the Netherlands with a profound love for hand made things with a mass production look and feel to them. 3D printing gives me the possibility to by hand create small run (art) projects that look like they we're pooped out by the thousands in a factory far far away. You can find some of these products in my Etsy shop. I also use 3D printing in other work and to fix or upgrade things around the house or on my printers.