[Upgraded Solid Brass] Includes 500 sets of 3/8' #2 solid brass grommets and washers, rust-proof for outdoor use on fabrics, leather, denim, tarps, canvas & vinyl, etc - ONLY compatible with our hand [Premium Handcraft Essential] Achieve precise holes with hole cutter, then set grommets and washers to the machine for a superior punch finish to elevate craftsmanship beyond standard machines, [Durability] Crafted from sturdy solid brass material, are resistant to corrosion and wear, ensuring a long-lasting finish on your projects. [Specification Dimensions] 3/8' (10 mm), Outer Diameter(Top of Grommet) 3/4' (19 mm), Height 7/32' (5.5 mm). [Widely Used] Versatile and can be applied for banners, tarpaulins, awnings, curtains, signs, posters, large production of clothing and leather manufacture, great choice for repairing fabrics,