10 Pairs (40 Pieces) KAMsnaps Nursing Maternity Clips Clasps Plastic Hooks Buckles for DIY Breastfeeding Bras Camis and Tank Tops White 12mm (1/2") Used on convert existing or new bras or tank tops into nursing or maternity bras and tank tops. 10 pairs = 40 pieces total, enough to convert 10 bras or tank tops. Makes a snapping sound when the clip is properly secured closed. Top and bottom clasps have a (1/2") opening for your strap.