![]() This first pin chamber now has a new position where the key pin and the master wafer create a clearing at the shear line. The master wafer in Lock No.1 creates a second combination of key biting that would allow a second unique key biting to open the lock. Master wafers come in different sizes to fill the gap between the master key and the unique lock key. It is similar to a driver pin but normally smaller in height. Now in the first chamber of Lock No.1 in our example, we may insert an additional pin between the driver and key pin, this is called a master wafer. ![]() The first notches do not align between the two keys. They are cut to the same height along this portion. Looking closely, the keys are identical along the last four (4) notches. Looking at two standard 5 pin chambered pin tumbler locks, each has its unique key biting. Each with one set of a spring and two pins, the driver pin and the key pin. In a standard pin tumbler lock, there are five (5) to six (6) pin chambers. That incorrect key will cause one or more of the pin chambers to be obstructed at the shear line and will not allow for the lock to be opened properly.Ĭurrently, there is only one combination of cuts of a key, the key biting, that will properly lift the driver and key pins to their appropriate positions along the shear line. In another pin chamber, the driver pin may be lifted above the shear line such that the key pin itself obstructs the shear line of the plug. The key will lift the drive pins once again, however, the key pins may be lifted short of the shear line, which would cause the driver pin to obstruct the shear line. Inserting the incorrect key will produce a different result. If the proper key is used, the key pins will push the driver pins clear of the shear line thus allowing the user to rotate the plug and open the lock. Upon inserting a key into a lock, the pins in the cylinder of the lock are lifted by the cuts and grooves of the inserted key. In that piece, we explain the specific mechanics of a lock and how we are able to pick it open. ![]() The trick is not in how the key itself is necessarily cut but rather how the cylinders of the locks themselves are pinned.įor a thorough explanation of how pin tumbler locks work, be sure to check out our article on “How do Lock Picks Work?”. How does a master key work?Ī master key is unique as it allows its user to open two or more locks effortlessly. That is a discussion for a future article, stay posted by signing up here on LockJudge. What is a Master Key?Ī master key is any key that can open two or more uniquely keyed locks.ĭespite this, master keyed locks are different from skeleton keys and keyed-alike locks. So what exactly is a master key and how does it work? We unlock those secrets next. The special ability of a master key comes from its ability to open different locks with a single key.Ī master key is able to create a security system called a master key system, which allows only specific keys access while the master key holder has access to everything. Mechanically, a master key works like any other key. ![]()
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