A die grinder is a versatile 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 burrs and sanding discs, allowing users to perform detailed work in tight spaces. These tools are commonly used in metalworking and woodworking industries, as well as by hobbyists for DIY projects. Die grinders can be powered by electricity or compressed air, with the latter often referred to as pneumatic die grinders. Safety precautions, such as wearing protective gear, are essential when using these tools.