A simple but functional hook for wall or ceiling mounted clotheslines.
Two versions: 6 hooks or 8 hooks (same size).

See my 3D printable models collection at https://www.redpah.com/profile/648/mascal

Just print with hooks flat on the printing plane (rotate 90°) and with some support.

ABS is best, but PLA sould also do the job. Use at least 30% infill and it should be strong enough.