40 screwdriver hex bits holder - 4mm

Simple screwdriver 4mm hex bits holder. Can hold as many as 40.

They don't fall out even if tilted, dropped or shaken. You might want to adjust the hole size for your printer.

The bits can be easily taken out by hand or with the magnetic part of your screwdriver.

Also included is a 3x3 test part to see if your bits fit and if the spacing is correct (you can pull them out with your fingers).

EDIT: added a box version here (https://www.printables.com/model/197676-hex-bit-holder-box)