picture frame stay / holder / fastener

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5824630.

quick fastener for the back of a picture frame to hold the back in place.

a bit chunky as i needed them for a very large frame but I don't see any reason why they wouldn't scale down

i printed with it set to all wall (just set cura to 100 walls) for extra strength.