This is just another type of dice that can be used with board games.

I designed it for a 10 mm steel ball. I used myself a ⅜" steel ball.

You can easily use other size steel balls by scaling the .stl

I printed it in PET for sturdiness, and 0.1 mm resolution for detail.

After printing, glue both halves together.

Update: I have added a design with aligned 1.9 mm holes. You can put in small pieces of filament to align the halves while glueing.