20 CleverDelights Magnetic Jewelry Clasps - Rhinestone Ball Style + Lobster Clasp - Silver Color Beautiful silver color - Rhinestone ball style with jump ring and lobster clasp pre-attached Total length: 1.25" (31mm); Tube diameter: 3/8" (10mm); Jump ring hole: 1/8" (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