These necklaces have the firefighter and medical designs. They are cut from the same coin and interlock perfectly together. They are cut entirely by hand with a jewelers saw. We will also carefully engrave your names, firefighter number and the RN and medical staff. This is not cut all the way through. It is etched deeply into the coin. We made our Interlocking designs because we wanted to create something that unites two people. Either a couple or friends or family. You give half to your special someone and every time they look at it, they think of you and the piece that fits it just right.