Set of 12 Skeleton Keys with Matching Numbers on Paired Keys Would be great placed in a bowl or jar Vintage condition Skeleton keys symbolize “access to” something, whether it be abstract, as in “keys to a city,” or actual, as in the key to your home. They are often thought to symbolize the key to one's heart, the key to success, or the key to “unlocking the door” to whatever it is one wishes to attain.