Skeleton keys, also known as pass keys, are designed to open numerous locks, most commonly a warded lock. While some believe that a skeleton key derived it's name because of it's shape and resemblance to a skull, the name actually comes from the fact that the key is stripped down like a skeleton to it's most essential parts: a cylindrical shank with a single rectangular tooth. The shank can be solid or a barrel shank which resembles the barrel of a gun.
The first locks and keys were made of wood and can be traced back to Babylon and Egypt. The locks and keys were large, heavy, and impractical. Aside from the weight, the wood locks were susceptible to brut force attacks. The wood devices were eventually replaced when engineers from Ancient Rome improved the design and began using iron and bronze which provided a stronger, more reliable lock.
Our fascination with keys lie far beyond their practical use. Keys unlock more than just doors. Whether a young boy proudly carrying an old skeleton key in his pocket or a woman sporting one around her neck, there seems to be something magical about keys.. it is as if the revealing of some mystical treasure or deep dark secret awaits, that only the right key will unlock.
THE CACHE
This cache is located in beautiful Elgin Park and will be easy to find...really easy. Your challenge will be to figure out how to open the cache. No tools, no sticks, NOTHING is needed but what the cache provides. Being gentle is very much appreciated. This takes a very light touch.
The key required to solve this cache is provided. Please pull it out carefully, pull it straight down to prevent damaging the attached cord. I suggest pulling out a couple of feet. It is on a retractable reel. Please return it to where you your found it when you are finished. IF the key is missing, please leave me a note. The cache cannot be opened without the key.
To open the lock:
- Enter the combination
- Depress and release the shackle, and the lock will open.
- To re-lock it you need to close the shackle (and hold closed), mix the numbers, then release the shackle.
Please remember to place the lock back on so it is facing front as labeled.
Geocaching is a great community of people, and credit for this cache idea goes to WVTim 
I hope you enjoy this one!
james-78 gets a big congratulations for FTF!! 