A die grinder is a handheld power tool used for grinding, sanding, honing, and polishing various materials, including metal, wood, and plastic. It typically features a rotating spindle that accepts different attachments, such as grinding bits and sanding drums, allowing for versatility in tasks. Die grinders are commonly used in metalworking and woodworking applications. These tools can be powered by electricity or compressed air, with electric models being more common for home use. Die grinders are essential for tasks that require precision and detail, making them popular among professionals and hobbyists alike in fields like automotive repair and jewelry making.