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 ...

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?

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 ...