2 parts to be assembled with screws or could be glued together. I designed around #6 wood screws (USA/what is had), that were 1 inch long (25mm). I also used 30mm round magnets that I got from amazon. I have included links for products I used below. Thanks for looking.
Magnet Used:
https://www.amazon.com/gp/product/B0967W4THW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Screw Options:
The author marked this model as their own original creation.