1.Material:Alloy,Magnetic 2.Size:4mm-12mm 3.Usage:For bracelet or necklace ... :gold,silver,ancient Silver,bronze etc.Product Details: Namemagnetic claspsMaterialAlloy+Magnetic ColorsGold,silver,bronze,ancient silver,etc.Stylemagnetic clasps for necklaces ... track the goods you order all the time. Jewelry findings --magnetic clasp