For, rust removal, paint removal, deburring. If concave surface of material is spherical, shape is easy to use in aspects where R is involved. Please also use in deburring after cutting, wood shaping, or on finishing work on wooden roots etc. Iron, light metal, wood
We use it as rust remover at the factory site. Up to now, I was going to buy at a nearby home center, so it took time and effort. If somehow I was watching the monotaur at the net, I bought it because the same thing was on it. It saved us a lot of trouble to go buy it. We will continue to buy regularly!