Grommets are small, ring-shaped devices made from materials like rubber, plastic, or metal. They are used to reinforce holes in various materials, such as fabric, leather, or metal, preventing tearing and providing a smooth edge. Grommets are commonly found in items like curtains, tarps, and sports equipment. To install a grommet, a hole is punched in the material, and the grommet is inserted into the hole. This process is often used in conjunction with tools like grommet setters to ensure a secure fit. Grommets are essential in applications where durability and protection from wear are important.