This part is designed off of the small magnetic parts tray from Harbor Freight and branded as “Pittsburgh” but i would assume all of these are same size from most brands. I used a little E6000 adhesive at the base to keep it in place.
I'll be designing a few more based on other sized magnet parts trays in, check out the profile for others!
Fits 4" Round Magnetic Parts Tray
The author marked this model as their own original creation.