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 ...

As a professional woodworker, I’d much rather use my tools than sharpen them, but I know dull or broken bits are unavoidable. I’ve had a toolbox filled with old drill bits, so it was past time to do ...

Dull drill bits are not usually a type of tool that's worth buying used, unless you can sharpen them yourself. Many companies that sharpen drill bits use precision grinding machines, but there are ...