A die grinder is a handheld power tool used for grinding, sanding, and polishing various materials, including metal, wood, and plastic. It typically features a rotating spindle that can accommodate different attachments, such as grinding bits and sanding drums. This versatility makes it popular in metalworking and woodworking applications. Die grinders are often powered by electricity or compressed air, allowing for high-speed operation. They are commonly used in tasks like deburring, shaping, and finishing surfaces. Safety precautions, such as wearing protective gear, are essential when using a die grinder to prevent injuries from flying debris or accidental contact.