[400Pcs Grommets Eyelets]: Package includes 400pcs grommets eyelets, 0.1inch(2.5mm) in inner diameter, and 0.2in(0.5cm) in outer dia, 0.16in(0.4cm) in height. Comes with a plastic box to storage: 7.4x7.2x1.7cm. [4 Colors Self Backing Eyelets]: With 4 classic colors available, gold, silver, bronze, gun black, easy to add or replace eyelets in just seconds. [Brass Material]: Our grommet kit is made of brass material, surface plating color, durable and waterproof, practical and sustainable. [Easy to Use]: Just cut a hole in the fabric, leather straps, clothing or leather crafts then insert eyelets by pushing through, finally secure in place with a squeeze of setting tools. [Widely Used]: Metal self backing grommet eyelets can be applied to shoes, bags, purse, jeans, clothes, canvas, dog collars, tents, leather and belts, repair and decoration.