I've been thinking about buying one of these but I don't know if they are just a gimmick. Also, if they genuinely work well how good do your bits need to be in the first place to be worth sharpening?

Darex brands include Darex industrial bit sharpeners, Drill Doctor professional and DIY drill bit sharpeners, Work Sharp Outdoor knife and tool sharpeners, and Work Sharp Culinary kitchen knife ...

An image of a man grinding a drill bit on a bench grinder - Best_Stocker/Shutterstock We may receive a commission on purchases made from links. If you're a ...

We may receive a commission on purchases made from links. You can tell a dull drill bit more or less immediately. If you're drilling wood, you'll likely see thin wisps of smoke as it starts to burn.

Up until recently, though, my collection of drill bit sets was so large that I had duplicates and often triplicates of all the bit sizes I commonly used because my older bits were worn out, and in ...