Die grinders are among the handiest and most versatile tools available. You can use them to remove paint and rust, clean welds, polish stainless steel, enlarge holes, and port and polish.
Air-powered die grinders are light and compact—made to perform precise cutting and shaping tasks in confined and hard-to-reach areas. Unlike electric die grinders, pneumatic die grinders can’t burn out. They do consume a lot of air, though—usually between 10 and 20 cubic feet per minute (cfm). For improved efficiency, look for higher quality die grinders. They use less air and often deliver smoother operation and more power.
If you want to learn more about die grinders, read on. This post looks at the following:
The Tool Corner 