A plastic nail head  you can secure to the wall with command strips and hang stuff.

I created two versions that should fit the Keyhole slots that I made.

Fake nail head sizes: 5.5mm and 9.5mm

I was able to hang a surge protector on the side of a cabinet for kitchen appliances. These can also be used for hanging some picture frames.

No supports needed when printing.

Nail head should be on top when attaching to the wall.

Don't hang anything too heavy; these are not real metal :-)

Required hardware:
Command strips or double sided tape