CleverDelights 8 Magnetic Jewelry Clasps - Barrel Style + Lobster Clasp - Silver Color - Clasp Converter Beautiful silver color - Barrel style End-to-end length -- 1.25 inches; Jump ring hole -- 3mm Easily fasten your necklace chains with these magnetic clasps Perfect for converting pesky necklace clasps into a simple magnetic clasp or for those suffering from arthritis Top-quality CleverDelights-brand clasps -- Ships from a USA warehouse