After 25 years of being a professional mechanic, in both aviation and public transportation, I had obtained a lot of drill bits. I used to sharpen them by hand. As needed.

I saw the Drill Doctor, and thought "wow, that is neat" and bought one. I decided to sharpen all my drills and when I had counted them, I had over 300 twist drill bits. [X(]

The Drill Doctor made short work of it. It sharpens them just fine, thank you very much.