uGems Magnetic Clasp 14k 4.4mm Gold Converter for Necklaces Closed Loops Strong Solid 14kt Tiny (Qty=1) Magnetic 14k gold tiny clasps, strong, converter for necklaces It is 4.4mm diameter, 15mm long, tiny size, with also a spring ring attached. USA Made Small closed loops on one side, ~2mm inner diameter loop, spring ring on the other DO NOT USE IF YOU USE A PACEMAKER, INSULIN PUMP, OR DEFIBRILLATOR 1 specified buys 1, 3 buys 3, etc.