

Here is a print in place Auto-Locked Hanger.
The model was inspired by a similar wood hanger with marble ball seen on Pinterest, but adapted for 3D printing.
Please see the print versions:
Print in place model (the ball is already in the main piece and needs a slight push to be detached)
1a. for double-sided tape
1b. for wall mounting using screws
Print with a pause (the pause is already preset) if you want the ball to be a different color (the ball must be printed first).
2a. for double-sided tape
2b. for wall mounting using screws
For wall mounting, 3mm Dia. screws to be used.
Credits:
Taser 101