The Outdoor Grommet #2 Chrome, Copper is a durable grommet made of chrome-plated copper. It resists corrosion and weather elements, making it suitable for outdoor applications. It has a hole diameter of 10/21mm and can securely fasten cables, ropes, or wires. Each bag contains 500 pieces, allowing for efficient and cost-effective installation. Overall, this grommet offers convenience, durability, and professional results.