These powerful #1 (5/16") self-piercing brass eyelets provide maximum security for specialized tasks. Fabricated from thick, high-quality brass (70% copper and 30% zinc), the Military Black Oxidized finish delivers a non-glare, exceptionally resilient coating. This finish is engineered to prevent rust and corrosion, making these grommets an ideal component for rugged, industrial fabrics and any type of tactical or covert canvas. The included gripping tooth washers provide reliable anchorage, greatly increasing hold strength on dense materials like equipment tarps, field tents, and heavy banners. Installation is simplified and rapid: these heavy-gauge self-piercing units cut the material and secure the eyelet in one integrated motion, streamlining your assembly process for superior, long-lasting outdoor performance.