Power bit holder which fits to a tool box or bag. Can be unfolded and so the bit pulled out very easily. There is a bumpy section inside, to keep the bit securely in. It is only useful for long shank bits (see photos).
Middle elements can be repeated to increment capacity by 10. Default size is 20 bits.
After printing, the hinges need to be cleaned from support material and adjusted to fit together.
Hinge holes might need some drilling. 1.5mm diameter steel wire is strong enough to fix the elements together.