This is probably the most used air tool in my tool box. If you are planning on doing any type of automotive body work or metal work then you will definitely benefit from this type of grinder. They are small and lightweight. They are great for grinding welds, paint and rust removal, and de-burring metal parts, etc. You can fit them with a 3M Roloc pad for 1″, 2″ and 3″ grinding discs. You can also fit them with 1/4″ die grinding bits and cut off wheels.

There are several brands that make them such as Ingersol Rand, Chicago Pneumatic, Sioux, Snap-On, Mac, Dotco, and so on.