I have dubbed these "boingers" in my head, because of the flexible spring they have when opening/closing. They can be linked together to form a chain, or worn individually to hang with charms. Their flexibility makes them supremely easy to enjoy as charm holders. Constructed of hollow tube with balls on both ends, there are two options: a polished rose-hued gold and a textured, more yellow gold. 

Please note these are true vintage and have light wear commensurate with age.

Each coil measures .45" across and weighs approximately 1 gram.