
5 Best Air Die Grinders - July 2020 - BestReviews
Perhaps paradoxically, an air die grinder (also called a pneumatic grinder) owes much of its versatility to its simplicity. Basically, it's a tool with a head that rotates very fast, but because you can fit it with many different bits, it can be used to sculpt, cut, grind, or polish all kinds of materials.