Simple storage box for a deburring tool and 12 additional inserts with magnets to hold parts and cover together. Uses 26x 5mm mini magnets. You'll need to pause the print to embed the magnets in the base of the cover, though the model should still work without the use of any magnets.

Designed to fit my deburring tool found here on Amazon, but it seems like many other models have a similar form factor.

As always, source CAD files are available to download and modify as well.