Drill bit holder

Hey, I designed this a while ago, and it has a few increments most people won't use, but it has the standard ones.

Holes are in mm, 2.5, 3, 3.1, 3.2, 3.3, 3.4, 4, 4.2, 4.5, 5, 5.1, 5.2, 5.5, 6, 6.8, 8, 8.2, 8.5.