Surepromise Prong Ring Snap Fastener Pliers Stud Press Pack of 100 Sets Snap Buttons Silver 9.5mm Diameter Silver Prong Ring Snap Fasteners Use for dummy clips, bandana bibs, baby grows, keyrings etc Press Studs size : Diameter 9.5mm Prong size: 3.5mm Each set contains 4 parts: a male, female and 2 prong rings