An angle grinder, also known as a side grinder or disc grinder, is a handheld power (or pneumatic) tool. Using high-speed rotating attachments such as grinding wheels, wire wheels, or cutting discs, it performs various processing operations on materials like metal and stone, including grinding, cutting, rust removal, and polishing. Owing to its high rotational speed, efficient processing, and flexible operation, this tool is widely used across many industries.