6 Silver Plated Magnetic Mag-Lok Bead Clasps This is a new set of 6 silver plated magnetic clasps Great for making necklaces and bracelets These hold as securely as any normal type of clasp, but make jewelry easier to put on and take off These magnets are so strong that they should not be used by anyone with a pacemaker Each measures approximately 6 mm (1/4") in diameter