Key pendants are and have always been a very popular present for all ages and almost every occasion and here is why:
Key pendants are customary given as a present on the 21st birthday. This tradition dates from the times when at twenty-one, you were considered old enough to be a key-holder to your family’s home, and thus hold a symbolical 'senior' position in the family. It's an old tradition that, some think, has long since become irrelevant and obsolete, but the symbolism of the key on the 21st birthday lives on.
Keys have always been endowed with a certain sort of magic. It’s believed they have the power to reveal things that were unknown or obscured before. In Far East cultures, keys are regarded as a "Good Luck" presents and a bearer of a good fortune ahead.
Ancient Asian tradition believes that a Key Pendant will open physical, intellectual, or spiritual barriers. Wearing a Key Pendant would give access to riches and treasures. The key pendant is given to open new horizons and new uncharted adventures. Furthermore, it is believed that a universal key called the “Skeleton Key” will successfully unlock anything you wish for. “Skeleton Key” pendant symbolizes "New Beginnings" for the person, wearing it. Skeleton Key pendants are a very popular present for 21st birthday and Graduations, both occasions, considered to be a "new beginnings".
In modern days, we have adopted the key as a symbol of entrusting someone with the access to one's Heart of Hearts. The “Key to Someone’s Heart” is given in the same fashion the “Key to a City” has been given for ages. The practice of presenting a "Key to the City" to an individual can be traced back the Middle Ages when it was a symbol of the City's intention that the recipient was free to come and go at will. Today it is considered a symbolic gesture, bestowed upon distinguished persons and honored guests for achievements of the highest importance. Giving someone the "key to your heart" will be a symbol of awarding them the highest form of trust and commitment. It is the way of saying -
“You Belong and You are Always Welcome".
When in a romantic relationship, it is considered the next big step for the two involved to exchange the keys from their homes. This is an act, that signifies the moment when a relationship is taken to the "next level" and the foundation of a life together has been laid.