[TechnoViking]

I have a bunch of old bits from various places. Many of them are dull. I'm wondering if it's worth it to try and sharpen them.

There are several styles of sharpeners out there. Ones that look like a pencil sharpener, and ones that are basically a jig that holds the bit in your desktop grinder.

I heard that once the bits become hot, from use or grinding, they are ruined. So should I try to sharpen them or just throw them out?

Thx,