The Outdoor Grommet #3 Gold is a high-quality, durable copper grommet designed for outdoor applications. It has a 12mm hole diameter and 21mm overall diameter, providing a perfect fit for various materials. Each bag contains 500 pieces, making it ideal for large-scale projects. It is dependable, aesthetically pleasing, and ensures a secure fastening. Upgrade your outdoor projects with this grommet for a professional and reliable finish.