Drill bits don't need to be replaced if they've gone dull, as there are multiple ways to re-sharpen them so that you can get extended use out of them.

If your drill bits no longer work like they used to, a drill bit sharpener can bring back their edge. Whether you work with wood, metal, or plastic, sharp tools work faster and more precisely than ...

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?

Add Yahoo as a preferred source to see more of our stories on Google. An image of a man grinding a drill bit on a bench grinder - Best_Stocker/Shutterstock We may ...

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