The switch plate to a small Raspberry Pi Pico powered keypad. Switch holes are sized for Kailh switches, similar sized ones should fit.
This keypad is designed to fit four M3x10mm socket head bolts and four M3 nuts.
The bottom case intended to go with this case can be found here.
Can be printed with any settings, I'd recommend printing it upside down without any brim, raft or support. I printed mine with 100% infill since the difference in time and material used were minimal.
Feedback is always welcome in the bottom and if you are having issues I'll assist as best I can.
The author hasn't provided the model origin yet.