Coghlan's Snap N' Tap Grommets are an easy solution for quick repairs to tarp grommets. Whether you're repairing existing grommets or adding new anchor points, these rubber gasket grommets work on plastic, nylon, or canvas sheets. They are versatile, easy to use, and provide a permanent repair for outdoor applications. Each package includes 8 polyethylene self-cutting grommets with an inside diameter of 0.43-inches (11 mm).