DOT Rolled Rim Grommet with Spur Washer #4 in brass offers a 9/16 inch inner diameter and comes in a 1-gross pack of 144 sets. Its rolled rim design with interlocking teeth ensures a strong hold that reinforces holes in fabric, making it suitable for outdoor, marine, and upholstery uses. This heavy duty, corrosion-resistant marine grade grommet provides durable tear prevention for tarps, tents, awnings, banners, flags, and similar applications. Installation requires setting tools. Ideal for upgrading patio decor and outdoor projects with reliable fabric reinforcement hardware.