Using a homemade drill bit sharpener, this simple jig makes it easy to sharpen different sizes of drill bits in just minutes. With the help of a grinder, you can quickly restore your drill bits to ...

watch how to sharpen multiple types of drill bits in just 3 seconds using a homemade drill bit sharpener! Learn this simple yet genius technique that can save you time and money, making your drill ...

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 ...