And then someone should definitely take most of the drill bits and
slowly release them into the wild as they are lost. That should make
them last longer as people are more careful about returning rare
resources [1].
1. http://www.bmj.com/content/331/7531/1498.full
It does well enough. Maybe not exactly the optimal one, but I've never
had any issues at all using only 0.5 mm increments.