Magnetic bracelet to hold magnetic objects like bits, screws... .
The strap opening is 24mm wide and 3mm thick, so you can also attach the magnet holder to a backpack.
There are two files, one for a rectangular neodymium magnet 20x10x3 and a round magnet 20x3.

The model was printed with a Bambu Lab P1P:
petg
0.2 layers
25% fill
3walls