Noun - magnetic pins, brooches, shoe clips & cufflinks. 

Introducing "Hot Magnets" for Men. They are like cufflinks but way cooler because you don’t need a French shirt to wear them. Simply put them over the buttons on your shirt sleeve, slip the inner magnet pieces inside, and you are ready to go! To make them even cooler, they can be customized with your own design!

cufflinks