These handsome tux studs set from our Gentlemans Collection are finely crafted from 14 karat solid gold. The spring-loaded mechanism features a tiny coil that allows one part to slip smoothly into the other, so that each piece fits securely into the button hole. PEARLS NOT INCLUDED, only 4 tuxedo stud findings. To design your tux studs with any pearl, call us at 1-800-50-PEARL Pearl care kit not included with this item.