This thing is a simple PCB mount foot for mounting a circuit board of some sort.

I needed some of these to hold the circuit board set in an arcade machine and decided to just make some myself.

Creality

Ender 3

Doesn't Matter

No

0.2mm

35%

Pretty easy to print. I used PETG but PLA or ABS should work just fine.

It uses a small-ish wood screw to attach to where the PCB needs to be mounted. And an M3 screw to hold the PCB in place.