Angle grinder is a handheld power tool that features a high-speed rotating abrasive disc for tasks like cutting, grinding, polishing, and sanding various materials, including metal, concrete, tile, and wood. It is powered by electricity, compressed air, batteries, or petrol, and can perform many industrial and workshop jobs, from removing rust and paint to sharpening tools and fabricating metal.
This video demonstrates how to use an angle grinder for various tasks: