Some bit holders
thingiverse
Here are the details: Various types of bit holders feature a primary hexagon and an extra socket for 1/4 inch bits. It's designed to work with magnets in sizes 80X16-80X20. If you want something custom-made, you can use Tinkercad and copy-paste an option that suits your needs.
Download Model from thingiverse
With this file you will be able to print Some bit holders with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Some bit holders.