15 bit holder
I was looking for a compact bit holder for my power tools.
I decided to use a honeycomb moder to minimise volume and maximise the amount of bits.
My design has a small extrusion inside to hold the bits in place if you want to have a cover simply print twice and put one over the other.
If you are interested in more or less storage for your bits let me know and I can modify the design for more or less bits.
Enjoy.