This is a remix, but I cannot find the original model I based this on. If anyone finds it, please let me know the link and I'll update the attribution.

This version has been rebuilt from almost the ground up to hold more hex bits, and a more common array of drill bits.

This is a rebuilt, modified and simplified print of a large drill and bit holder. I've included two versions, one for Prusa size machines and one for larger machines.

It's also now a step file for easy editing.