KAMsnaps 100 White Lead Tested KAM Snaps Size 20 (1/2 inch) Plastic Button Sewing Fastener CPSIA-Compliant Cloth Diapers Bibs Unpaper Towels PUL 100 complete sets. 1 set = 2 caps, 1 socket, 1 stud. Professional grade, the same quality used in commercial applications. Size 20 glossy, standard length. Requires KAM or Babyville pliers or KAM press to install (sold separately--see ASIN B015XDZ666 for compatible pliers). Snaps are commonly used on clothing, cloth baby diapers, bibs, towels, and other embroidery, craft, sewing and household projects. NOT intended for thick/dense material like double layers of marine vinyl (which require size 20 EXTRA LONG snaps).