1.Wavy U shape makes it hold your hair firmly and perfectly. 2.Designed with ball tips which is comfortable to use without digging or scratching your scalp. 3.Suitable for different occasions like appointment prom wedding daily use. 4.Donât be afraid to break hairpins. They are made of a light weight metal alloy that wonât break like plastic pins. A hairpin is a small clip or pin that's used to secure hair in place. A bride's fancy braided hairdo usually requires many hairpins and plenty of hairspray to hold it. A bobby pin is one type of hairpin a small bent piece of metal that pins strands of hair against the scalp.