If you're a fan of Doctor Who, then you will recognize this as the Seal of Rassilon. It was said to be an ancient symbol for warding off evil.
The cufflinks are made of sterling silver (fronts and cufflink mechanism on the back). The are circles approximately 3/4" or 2cm diameter.
The cufflink backs are torpedo style and soldered to the fronts (never glued)
All of my jewelry comes in a gift box, with a ribbon, so it's ready for gift giving to friends or family - or a little treat just for you!