Gold and Onyx Tuxedo Studs Only. A classic design perfect for any black tie event. Spruce up your formal wear with the chic Onyx and Hematite Striped Mosaic Stud Set. Studs feature a trigger mechanized backing for easy application. Rhodium plated silver, Onyx and Hematite with bullet back closure on cufflinks. Dimensions: Approximately 3/4" x 1/4" (cufflinks), 3/8" x 1/4" (studs)