Bluemoona 100 Sets - 12mm 1/2" Metal Snap Fastener Leather Rapid Rivet Button Sewing (Gun Black) Size: Cap diameter 12mm(1/2") Color:Nickle, Gun Black, Bronze, Gold, Gray Silver,Mixed(5 Color Each 20 sets) Each set of Snap includes 4 parts: 2 caps 1 stud and 1 socket Material:Metal Use for decorating your fabric, bags, Shirt, shoes, etc.