These are nickel free bra making front swim closure in silver. They are heavy duty and can be used for swim. The opening can accommodate 1 material
Silver Metal Nickel Free Bra Making Front Closure Swim Hooks - 1 inch/25mm - DIY Supplies, Lingerie Design, Replacement
Plastic Sewing Underwear Accessories Accessories Closure Bra Buckle - 50sets 8-25mm - Aliexpress
12mm 1/2 Silver Metal Bra G-hooks Hooks for Bra Making and
Plush 1/2 or 12mm Decorative Edge Black Bra Band Elastic 5 Yards
Black Bra Making Replacement Hook and Eye Tape Closures 3 Rows 2 1
1 Piece 1/2 12mm Rainbow Color Nickel Free Front Closing Bikini
Alloy Replacement Accessory, Metal Replacement Accessory
5 Sets Bra Alloy Front Closure Swimwear Clip Clickers Bikini Buckles Replacement Bramaking DIY Accessories
10 Sets 3/4 (20mm) Silver Nickel Free Front Closing Bikini Clasp Clickers Closure 3/4 Wide Bra Making Lingerie Sewing Bramaking(Silver) : Arts, Crafts & Sewing