Cách sử dụng
A grommet is a small, circular piece of material, often made of metal, plastic, or rubber. It is used to reinforce or protect a hole or opening in something, such as a piece of fabric or a sheet of metal. Grommets are commonly used in clothing, shoes, tents, and banners, among other things, to help prevent fraying or tearing and to make it easier to thread a cord or rope through the opening.