You can insert a magnet in it but well it is pretty unnecessary as the bit fits in there quite snugly already. Knurled cap, quick print and stuff, it is really useful.

Print w/ at least 3 shells and 15% infill. You can use adaptive layer heights for the threads being 0.14mm and the rest being 0.21mm but should not matter all too much.

The screw cap needs a little bit of going back and forth to get in there smoothly ( ͡° ͜ʖ ͡°)

Stores five 6mm screwdriver bits, one being on the tip. It won't fall off so don't worry

This was a remix actually but I couldn't find the original model which did not have a bit container.

Have fun printing and using this tool, post a make if you think it's worth printing.