Master key common queries
Finding relevant, accurate information about master key systems can be difficult. So, to help you learn more about what they are, what they do and their features and benefits we have asked the experts for you.
What is a master key system?
A master key system is a security solution for a building or series of buildings. It consists of a number of cylinder locks that can each be opened by one individual and also by an overriding master key.
This enables you to grant specific individuals or groups access to certain areas, creating a hierarchy of access based on requirements.
How do master keys work?
Cylinder locks typically utilise pin tumbler systems, which consist of a system pin, a driver pin, and a spring. The pins and drivers sit at different heights within the cylinder and prevent the plug from turning. An authorised key has its own unique key cut, which matches the pin combination within the cylinder lock. For the cylinder lock to operate, the pins must line up to create a ‘shear line’ within the cylinder when the key is inserted.
For master key systems, there must be more than one pin in one of the chambers (usually referred to as a master disc/wafer). When keys are inserted that correspond to both of these combinations, the shear line is created and the plug can be turned.
Can you design your own master key system?
Absolutely. Contact your local distributor who will be able to help you.
What are the benefits of a master key system?
Having a master key system in place allows the building manager to have complete control of who can access the different areas of the building(s).
By streamlining access in this way, a well-designed master key system simplifies circulation around a building, making it more efficient.
On a security level, it also reduces the number of keys in circulation, therefore limiting the risk that keys will fall into the wrong hands.
In addition, if the master key system is patented, this means replacement keys can only be obtained from an authorised dealer with permission – again reducing the risk that security will be compromised.
Can a master key system work with a padlock?
Yes, padlocks can be incorporated into UNION master key systems. Also, UNION master key systems can be created with a range of cylinder lock types, ensuring the entire facility can be covered.
What are the security benefits of a master key system?
Installing a master key system enables building managers to have control over who can access their facilities. This means that only approved persons will have access to certain areas – meaning security is tighter.
In addition, if the master key system is patented, then it will not be possible to duplicate the keys except with an authorised dealer and permission. Again, this makes the facility more secure as bad actors will not be able to duplicate keys at their local heel bar such as Timpson’s.
Is it easier to pick a lock that has a master key?
No. How easy or difficult it is to pick a lock depends on the security features of the cylinder being used – for example, whether it has anti-pick protection, bump protection, drill protection, etc.
Why is patented key protection important?
The only true guarantee against keys being legally copied is patent protection, which is wholly concerned with the functional aspect of a product or process. This is in contrast to trademark protections – which only cover non-functional elements of a product such as words, phrases, or logos - and design registrations, which again cannot be registered if the features of the shape are purely functional, as with a key.
There has long been a myth that so-called ‘trademark protection’ can prevent key copying, but this is false. It is important that merchants are aware of this and do not unwittingly stock or sell cylinders that misuse trademarks in their promotional material.
For more information, we've created a new guide that reveals the truth about key copy protection.
How do you stop someone copying a master key?
The only way to stop an unauthorised person from being able to copy a master key is to ensure that the key is patent protected.
Can you add more locks to the same system at a later date?
Yes. However, it is crucial that any expansion plans are stated during the initial creation process, allowing us to build the capability into the cylinders.
As a rule of thumb, we generally allow 30-50% expansion for all master key systems.
“How do I buy a master key system?”
There are two ways you can buy a master key system.
The first is through a distributor, using our ‘Distributor locator’ to find your local branch. Once you have outlined your system with the distributor, they will liaise with our dedicated master key team to create and build your order, which is then shipped to them for installation. We have a large number of countrywide dealers/locksmiths who are able to support you in designing and building a bespoke master key system.
Alternatively, you can contact our master key team directly, who will identify a local distributor for you to work with.