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 ...

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?