This is a mounting plate for the KeyStudio Raspberry Pi Breakout Board. I have included three types or configurations of this plate.
Hardware Needed to mount the Breakout Board to the Plate: 4, M4x4mm Pan Head Screws.
KEYESTUDIO Raspberry Pi PICO Shield Pico Breakout Board for Raspberry Pi Pico/Pico W/Pico H
https://www.amazon.com/dp/B0D3KWTLF2?ref=ppx_yo2ov_dt_b_fed_asin_title
The author marked this model as their own original creation.