✿[Second Generation]: All the flat back earrings stud are internal thread, never fall off! The thread is an EXTENDED design. EASIER to locate and tighten than the first generation. ✿[Hypoallergenic Nose Studs]: These flat studs are made of G23 TITANIUM(ASTM F136), hypoallergenic and anti-rust cartilage earrings. You can wear it while sleeping and bathing. ✿[Multiple Uses]: Multiple used as nose piercing jewelry, helix earrings, conch helix piercing jewelry, lip rings, labret jewelry, medusa piercing jewelry. ✿[Item Contain]: 2Pcs tragus piercing jewelry, 1pc insertion pin tool help you to wear, AAAAA shiny zirconia lip piercing jewelry, affordable nose studs for you. ✿[Size]: Gauge=16G/18G/20G, 2/3/4mm zirconia available, 6/8/10mm bar length you can choose. You will receive 2PCS stud earrings for women men and 1pc insertion pin tool. They are also nice gift for body piercing lover.