Our grommets are made of solid brass and will not rust. These quality brass grommets come in a large variety of sizes and colors for ClipShop grommet press machines. Smaller size grommets from #XX00 through #5.5 are self-piercing grommets, giving you the ability to punch the hole and set the grommet in one simple step when paired with the proper grommet die. Larger grommet sizes, including #7.5, #8.5 and #12, are not self-piercing and require a hole punch die and a setting die. They also come in several colors including the popular brass, an antiqued brass for a rustic look, a nickel silver, and a black oxide that is close to a dark charcoal. Some select sizes are also available in more unique colors, such as satin nickel, satin brass, gun metal, copper oxide, and white.