This silver round cufflinks pair is made of real 925 sterling silver with a 925 sterling silver stamp as a symbol of guaranteed product quality Sterling silver is hypoallergenic and nickel free making this a great choice Featuring a bold black onyx center set in a polished round frame these cufflinks offer timeless elegance and a modern edge Perfect for formal occasions business attire or as a refined gift for any gentleman This classic minimalist design can be worn simply for an elegant look and complements a wide range of dress shirts suits and tuxedos Designed with a classic bullet back closure for a snug secure fit and quick fastening every time This pair is an ideal gift for Fathers Day husbands grooms grandfathers or colleagues on birthdays holidays graduation anniversaries or wedding parties