Hello! These are two textless deck boxes, one for 60 and one for 100 sleeved MTG cards.
Each one uses two 10x3 round magnets. The best way i found to mount them is to: insert the magnet, put a drop of glue and than secure it with the magnet blocker. Because the manget blocker is so small it requirse a little bit of sanding, just to make it more rectangular.
Magnets used: https://www.amazon.it/gp/product/B07MMB2F45/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

CUSTOMIZATION
In the Customizer you'll be able to generate a deck box choosing: the cavity size, the number and size of the magnets, and the side text.
I've tried a paint marker on the text but it bleeds, probabliy acrylic paint will do the trick.

Thanks to:
Gus Smith, for his "Simple tool for creating polyhedrons in OpenSCAD".
https://gusmith.wordpress.com/2015/09/18/simple-tool-for-creating-polyhedrons-in-openscad/
Daniel Upshaw, for his module to generate parallelepipeds with rounded corners.
https://danielupshaw.com/openscad-rounded-corners/