Sharpening drill bit

This week I leanred how to sharpen a bad drill bit. Drill bits are expensive so if we can save the bad ones, nothing better. I sharpened a couple bits one with the drill Doctor which I did not like, I prefer sharpening with the stone grinder. By doing this I leanred which way I like to sharpen drill bits, then how to use the drill Doctor and how to sharpen on the stone grinder which took a bit of practice but I got good at it. Here is a picture of my work...

Here is a hole I made with it....

Here is another drill bit I sharpened with the stone grinder...

Here is a hole I did with it....