Two variants of magnetic bit holders for DeWALT cordless screwdrivers, one for 6 and another one for 7 bits.
I used 8x3mm magnets and pushed them in from the back side. As there is enough space, you can use hot glue to fix them.
My print was with PETG and 0,2mm but it will also work with PLA. You'll need supports on build plate only.
The author remixed this model.
I didn't want to glue the magnets from the front side but to push them in from back side so they cannot fall out.