16mm Antique Copper 2 Loop Hammertone Magnetic Clasp Set By TierraCast. This 2 loop hammertone magnetic clasp will be a great addition to many different styles of designs. It is very strong, you can be assured your jewelry is staying put with these clasps! Each clasp set is approximately 16mm wide and 16.5mm high with the loops. Loop hole inside dimensions is 1.5mm. Lead free and made right here in the USA! Sold individually.