Hex bit carry case

The hex bit holder part should be printed in TPU. I recommend printing with 0.001 slicing gap radius at 0.3mm height with a larger nozzle to achieve a print with wall features only.

There are small notches in thee hexagonal keys that hold the bits in place but allow them to be easily taken in and out. 

The sliding holder latches into a notch in the shell. 

The outer shell can be PETG/ASA etc.