Simple hook for drop ceiling rails. I saw the https://www.thingiverse.com/thing:2255187 by @jbukont and remade it into a longer hook to hang some banners.

Print instructions

I used a 0.6 nozzle, PLA+, 40% infill, and 0.30 height to print but it really depends on the load on this. I didn't need them to hold lots of weight...just banners.