With an angle grinder you can cut or sharpen in metal or stone. For example, you use a grinding tool to sharpen pipes, remove burrs from steel with a grinding wheel or make deep slots. You have angle grinders that work on mains power, but also on battery. The size of the grinding wheels is also something to pay attention to. Do you have a relatively small disk of 115 millimeters enough, or do you need a large angle grinder with a 230 diameter disk to do your job? These are things to think about, to come to the best angle grinder for you.