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

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 ...

Most DIY-ers use traditional drill bits to create holes in wood and other items. Sharpening a regular drill bit can be done by hand or with a bench grinder. But what if you use a step bit, also called ...