High Security Locks & Keys
We offer a range of higher security key systems that are compatible with nearly all commercial grade locks and security hardware in the Australian market.

High Security Key Systems improve the reliability & security of standard locks by offering benefits such as;

Key copy protection – Stop just anyone copying your keys.
We can ensure that unauthorised duplicate keys are extremely difficult if not impossible to make, anywhere in the world, by anyone except the you.

Master Key Systems – Have One Key to Rule them All.
We can make it so that each persons key opens all the locks within the same building or organisation that the person needs access to, and no others. For example, the cleaner’s key may open the all the office doors she needs to clean but not the stationery cupbaord. The gardner’s key may open all the gates and the tool shed, but not the offices, etc. This is perfect for residential & commercial office buildings with multiple communal entries, stairwell, and car park doors.

Higher Security – Make your Locks Pick & Manipulation Proof.
We can make your locks fully resistant to all known techniques of surreptitious entry. That even means us. Ensure that Government Spooks, burglars or PI’s can’t pick your locks with you knowing about it. Yes, Governement Law Enforcement Agencies do pick locks to take sneaky peeks, if they can.

Improved Durability & Reliability – Eliminate worn key & sticky lock problems.
Higher Security keys and lock cylinder are made from better quality materials and to tighter tolerances, ensuring that they last significantly longer than standard locks and keys. This is a must for high traffic locks on doors such as communal entry doors that get used hundreds of times daily.

Give us a call anytime to have a chat. Call 0435 247 999


Master Key Systems

A masterkey system is a system where more than one key operates a given lock or series of locks.
It can be as simple as having a communal entry door where all the individual apartment keys open the communal entry lock. It can be as complex as many locks at multiple facilities such as a mining company or hospital.

We can design in a key for any position in your organisation with any level of convenience desired when we build the system.

For example, whereas CEO’s key might open every lock in the company, the cleaner’s key might only open all the common area doors and the cleaner’s cupboard.

Where the gardener might be issued a key that opens all the external padlocks and the tool shed where they keep the mower, the IT nerd might be given a key that opens his office and the server room only.

The thing to remember is that with each key you design in to operate a given lock, you are incrementally decreasing the security of the lock in question.

A master key system properly designed and built by good locksmiths, is done in such a way as to maximize convenience while minimising the reduction to security inherent in making any given lock work with more than one key.

At 24hmelbournelocksmith.com.au, we were trained in the old school of Masterkeying by one Mr Gary Wilson. Anyone who is anyone in this industry knows that you don’t pass Mr Gary Wilson’s MasterKeying class unless you know your shit. He stopped teaching that class in 2002, and in 2003 the industry moved to teaching the apprentices professional MasterKeying software instead of the old school pen and paper method. This can be compared to giving a 5 year old calculator when trying to teach him 2+2=4.

Limitations On A Masterkey System

All major high security key systems can be built into masterkey systems. The amount of key differs mechanically possible is the limitation on the size of any given key system.

In the old days, the limited amount of key differs mechanically possible to a traditional inline 5 key system was a real problem. It took a lot of mind numbing progression charts to nut out large key systems to avoid cross keying and ghost keys.

These days, thanks to the advent of computer software to do the math, and new innovative lock designs, master key systems can be designed to almost any size and specification with minimum loss of security with the possibility of quite literally thousands of locks capable of being keyed to a single system with multiple levels of change keys, sub Masterkeys, and Grand Masterkeys.

There are many higher security upgrades available for locks in the Australian market and some have clear advantages over others, with security not being the only factor in choosing the correct one for you and your situation.

The local football club has different needs to a shopping centre which has different needs to an industrial mine site.

We can advise on and install a wide range of high security key systems that will be designed and built to your needs, no matter your size or location.

Give us a call anytime to have a chat. Call 0435 247 999


Common Examples Of High Security Lock & Key Systems


BiLock is manufactured by Australian Lock Company in Australia, and offers an innovative design & twin bladed key which have 12 pins in total, 6 on each side. These activate 2 sidebars to provide the up to 17,000,000 possible key differs.



Galaxy is also manufactured by Australian Lock Company, in Australia, and is designed & built for convenience whilst maximising security & offering an enormous amount of possible lock & key combinations.

Give us a call anytime to have a chat. Call 0435 247 999

Its streamline design eliminates the need for tumbler pins and/or coded discs to create permutations. Galaxy’s extensive product range makes retrofitting existing locks simple and applying new combinations quick & easy.

Galaxy’s stainless steel key comes with a lifetime guarantee against breakage and is available in 21 different key head colours.

Lockwood MT5

MT5 is manufactured by ASSA ABLOY.

Lockwood MT5 provides protection against illegal key duplication via the revolutionary Alpha Spring and patent protection until 2024.

At the tip of the key is the revolutionary Alpha Spring – which engages a unique pin at the rear of the cylinder mechanism creating another shear line.

MT5 keys are double sided and can be inserted either left or right and are designed to function no matter the direction it is inserted. This significantly reduces the amount of wear and tear that each key and lock has to endure.

Generation Six

Generation Six is a medium security restricted key system manufactured by ASSA ABLOY. It is, as the name describes, a 6 pin inline pin tumbler lock. Conventional key systems that come standard in most locks are 5 pin inline lock systems, meaning there is a significant increase in security and possible key combinations. The other factors that increase security are that picking and manipulation tools are almost impossible to get into the keyway, and the fact that keys cannot be duplicated by unauthorised parties.

JA, JB, JC, JM Locks

These were high security key systems but as the patent has expired on them, they are officially no longer restricted, and anyone can legally buy the key blanks and start cutting the keys.
A major problem with out-dated and obsolete key systems is that the manufacturer stops producing parts, which makes the locks difficult to reliably maintain.

If you have one of these keys, then you may wish to consider upgrading to the one of the newer systems where the patents are still current and the lock cylinders are still considered high security.

International High Security Locks & Keys

The locks & keys above are certainly are not the only high security option available and certainly not the only systems we offer. There are many different options that are not common in Australia, but are available worldwide. We have International Partners in the UK, the USA and Brazil and have easy access to high security locks and keys from these markets.

If you want something even higher security and absolutely different that virtually nobody has seen here in Australia, one of our International Key systems might be for you.
At 24h Melbourne Locksmith we can help with all your high security and masterkey system needs.

Give us a call anytime to have a chat. Call 0435 247 999

Give us a call anytime to have a chat.
Call 0435 247 999

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