Magnetic Design: These invisible magnetic snaps feature a double-sided magnetic closure, strong enough to hold securely without damaging your fabric. You can also use them to replace your old snaps and DIY your creations. Easy to Sew: These sewing magnetic snaps are easy to install, thin, and easy to open and close. You can sew them directly without any fuss to maintain a clean aesthetic. The PVC packaging does not need to be removed during use; it is designed to prevent rust. Wide Applications: These round hidden purse fasteners can be used in clothing, bags, purses, backpacks, jacket pockets, wallets and lanyards, clothing closures, bibs, diaper gift boxes, and DIY crafts, etc. They are a beautiful alternative to your old snap fasteners. Package Includes: Comes with 20 pairs of round hidden sew magnetic snaps. Each snap is 1.2 inches (3 cm) long with a magnet that is 0.59 inches (1.5 cm) in diameter. Sufficient quantity to meet your sewing needs and provide replacements. A friendly reminder: The yellow magnet is positive, the silver one is negative and better suited for lightweight fabrics. Please ensure the magnet is facing the other way when sewing it into your garment.