This classic round magnetic clasp is made from nickel-free brass. Hole Size: about 1.2mm Sold per bag of 3 clasps.    

These classic magnetic clasps are made of solid brass with an antique copper finish. Hole Size: about 1.5mm Sold per bag of 2 clasps.

This classic round magnetic clasp is made from nickel-free brass. Hole Size: about 1mm Sold per bag of 2 clasps.