Window blind cord or chain hook
Ooops, I appear to have designed and printed something useful 
Just joking, its always nice when you make something which you actually needed.
The lines you see in the photo are the infill patterns which are visible as the PLA I used is slightly transparent.
Just in case anyone else needs any…
Upgraded version to include built in pulley? 
I did think about that but the other half asked for it to be subtle 
Maybe run a track on the inside of the loop then so it can move smoothly without catching on the beads, then the overall profile of the hook is unchanged 
You would probably like this PLA then. Its from 3DFilaPrint and is the wood colour.
It looks like it belongs there. nice work.