Discover an amazing technique that few people know about—sharpening drill bits to restore their functionality and precision.

Dull dill bits can be sharpened in a number of ways, but this method takes much of the guesswork and effort out of the process. Find out what it is.

This article was taken from the March 2015 issue of WIRED magazine. Be the first to read WIRED's articles in print before they're posted online, and get your hands on loads of additional content by ...

The Drill Doctor DD750X drill bit sharpener allows the user to create a custom point angle between 115 degrees and 140 degrees. With this sharpener, the number of relief angle options has been more ...