Are you looking for an experienced and skilled locksmith/installer to professionally install your locking system using top-quality tools? Schlüsseldienst München – Mario Pichelmaier specializes in the expert installation of complete locking systems and would be happy to assist you with this project.
A master key system generally refers to a combination of locking cylinders (and locks) where access and opening authorizations are defined by specific keys or sets of keys.
There are many different types and versions of locking systems. An important distinction is whether the system uses keyed-alike or keyed-differently cylinders (or a combination of both).

With locking systems, you can regulate access permissions to residential and commercial buildings in detail.
Keyed-Alike and Keyed-Different Lock Cylinders
Keyed-alike means that several lock cylinders and locks can be opened and locked with one and the same key (master key or central key). Keyed-alike locking systems thus reduce the number of keys on a keychain. However, if a master or central key is lost, several lock cylinders must be replaced, which can become expensive, for example, for the tenant if they are not insured for key loss.
Keyed-different means that a different (separate) key is required for each lock or lock cylinder.
The experts at Locksmith Munich – Mario Pichelmaier can help you at a fair fixed price with both the installation of keyed-alike as well as the assembly of keyed-different lock cylinders and corresponding locking systems. Call us now and receive a personal consultation!
Variants of Locking Systems
Since there are many different types and variants of locking systems, it is advisable to receive personal advice from a real expert right from the start. We are pleased to present the most important variants below:
Keyed-Alike Locking System
In a keyed-alike locking system, exclusively keyed-alike lock cylinders are installed. This means that a single key (master key) can unlock all cylinders of the same type.
Central Locking System
The central locking system, also known as a central lock system or Z-system, has the advantage that an individual apartment key (individual key) can unlock specific central cylinders installed in commonly used doors. However, apartment key A can only unlock apartment door A, but not apartment door B. For this reason, central locking systems are gladly used in apartment buildings. More information on central locking systems can be found here.
Master Key System
The master key system, also known as an HS-system, provides that a master key can truly unlock all lock cylinders of the same type. If an HS-system were to be used in an apartment building, there would be a master key that could also unlock the cylinders of the apartment doors (individual locks). More information on master key systems can be found here.
Central Master Key System
The central master key system, also known as a Z/HS-system, features several central keys that can unlock central cylinders of commonly used doors, but not individual locks (cylinders of apartment doors). In a Z/HS-system, there is basically also a central master key that can unlock all central cylinders. However, even this key cannot unlock the cylinders of apartment doors. More information on central master key systems can be found here.
Grand Master Key System
The grand master key system, also known as a GHS-system, is a locking system that features multiple locking tiers and thus different hierarchy levels. The highest-ranking key is the grand master key. This key can unlock all cylinders of the system. Furthermore, there are master grand group keys, grand group keys, group keys, sub-group keys, and individual keys. Various keys can thus be defined for main and sub-areas, which only unlock the cylinders in the respective areas. More information on grand master key systems can be found here.
Professional Installation of Locking Systems in Munich
The Locksmith Munich – Mario Pichelmaier is very well-versed in the different variants of locking systems. His competent locksmith technicians are capable of professionally and properly installing your desired locking system, regardless of whether it is a Z-system, HS-system, Z/HS-system, or GHS-system. Feel free to contact us and receive a personal consultation. For more complex locking systems, we are happy to arrange an on-site appointment to clarify all important details for the installation of your new locking system.
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