This is a Suction Cup Hook that can be printed all at once.
Its bottom has a folding holder that can make it stable when using.
It can be rotated freely to fit different force directions.

The M4 thread has been prefabricated in the model, recommended print layer height is 0.1.
You can buy the suction cup with an M4 thread screw on Amazon, search"suction cup M4":
[https://www.amazon.com/s?k=Suction+M4&ref=nb_sb_noss](https://www.amazon.com/s?k=Suction+M4&ref=nb_sb_noss)

see my other designs at:
[https://www.printables.com/social/275496-wuguigui/models](https://www.printables.com/social/275496-wuguigui/models)

Enjoy!