Depending on the blade or attachment used, can grind, buff, polish, cut, sharpen, and clean.
Suited to many materials, including tile, metal, stone, concrete, brick, and wood.
Cordless angle grinders offer mobility. Corded grinders typically generate more power at a consistent level due to the direct connection to the outlet. Provides the ability to keep on working as long as you want to without having to stop for a battery recharge or replacement. The trade-off is that you have to deal with a cord.
For safety, a guard sits between the disc and the handle to protect the operator.
The angle grinder is a useful addition to the toolbox of any DIYer.