CrazyPiercing 10 PCS Silver Magnetic Clasps for Jewelry - Necklace Magnet Clasp Converter Easily fasten your necklace chains with these super-strong magnetic clasps Perfect for converting pesky necklace chains into a simple magnetic clasp or for those suffering from arthritis Beautiful silver color - Tube style Top-quality CrazyPiercing - brand clasps Total length: 5/8" (15mm); Tube length: 3/8" (10mm); Tube diameter: 3/16" (5mm); Connector hole: 1/16" (2mm)