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Skeleton key

technology Maturity 11-13 Next article →

A skeleton key is a special type of master key.

Skeletonkey
Skeletonkey

Most keys are made for just one lock. A skeleton key is different because it can open many locks. People sometimes call it a passkey. It is often used for warded locks. This name comes from how the key is made. It has been reduced to its most essential parts.

Warded Lock Keys
Warded Lock Keys

This makes it a very useful tool.

To make a skeleton key, a person files down the teeth.

Padlock Skeleton Keys
Padlock Skeleton Keys

These teeth are on the bit of the key. Removing the center of the bit makes the key thin. Inside a lock, there are parts called wards. Wards are meant to block a key from turning. A thin skeleton key can pass by these wards without hitting them. This allows the key to rotate fully and open the lock.

Skeletonkey
Skeletonkey

Some locks use levers to stay shut. A skeleton key can work with these too. These are called lever locks. A key might have three or five levers inside. The top of the key pushes these levers to the right height. The warded section of the key then passes through without a stop. This is how the lock opens. It is a clever way to handle many different parts at once.

There are different ways to use many keys together. In a master key system, all locks have the same lever heights. Each door has different wards. A specific key opens only one door, but the master key opens them all.

Warded Lock Keys
Warded Lock Keys

Another way is a keyed-alike system. In this system, one key opens every door. However, there is no single key that opens only one lock. These systems help people manage many doors easily.

People use skeleton keys for many different jobs.

Padlock Skeleton Keys
Padlock Skeleton Keys

In hotels without electronic locks, staff use them. Housekeeping services use these keys to enter rooms. They are also helpful if an original key is lost. Sometimes, people use filed-down keys for bad reasons. They might try to use them to release handcuffs. But many people use these keys for helpful, legitimate work.

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File:Skeletonkey.png
Skeletonkey.png
File:Warded Lock Keys.png
Warded Lock Keys.png
File:Padlock Skeleton Keys.jpg
Padlock Skeleton Keys.jpg
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