I've always wanted a double headed coin. But instead of being really lucky and finding one, or being really rich and buying one. You can print your own! Yes it looks like a quarter. But, it is bigger then a quarter. It says Liberty, In God we trust, has an S for made in Sweden, and signed by a one Mr. MCW myself. Yeared at 1969. Not as much detail came out as I would like.
A single ball and socket piece. 2 are required to make a single working ball and socket joint. The distance gained by each length is about 1/2" so 18 would give you 9" length which is the average length of a bracelet.