Size - 100 sets 10mm x 16.4mm metal eyelet grommets, each set includes 2 parts: an eyelet, and a washer. Material - These small round grommets are made of metal with a painted finish, making them sturdy, corrosion-resistant, and durable. Application - Good for clothes, shoes, bags, card making, canvas, tents, leather crafts, decorating scrapbooks, and more DIY items. Features - Available in a variety of sizes and different colors to meet your daily DIY craft needs. Note: If you are using pliers, please pay attention to the direction of the buttonhole and the pliers, the wrong direction will cause the buttonhole to be damaged.