Master Key Systems: Why Sigma X is the Smarter Choice

What Are Master Key Systems?

A master key system is a secure way to manage access across multiple locks without carrying dozens of keys. Instead of each lock needing its own unique key, a master key system allows you to decide which keys open which locks.

For example:

- A cleaner or gardener may have a user key that only opens a front gate or service entrance.

- A property owner or manager could hold a master key that unlocks every door.

This flexibility makes master key systems ideal for homes, offices, schools, body corporates, and multi-site businesses.

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Restricted vs Non-Restricted Keys

When setting up a master key system, you’ll need to choose between restricted and non-restricted keys.

- Non-restricted keys – These can be copied at most hardware stores or key cutters. While convenient, they pose a major security risk since anyone with a copy can make more without your knowledge.

- Restricted keys – Only authorised locksmiths can cut these keys, and only with written approval from the registered signatory. This eliminates the risk of unauthorised duplication.

At Lancaster Security Supplies, we strongly recommend restricted systems for maximum protection and long-term peace of mind.

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Why Choose the Carbine Sigma X System?

While many restricted key systems are available, we trust and recommend the Carbine Sigma X restricted system. It’s one of the most advanced and future-proof options in Australia, designed for security, scalability, and convenience.

Key Features of Sigma X:

🔒 Restricted Key Duplication – Copies can only be made by authorised signatories.

📜 Patent Protected Until 2035 – Legal protection ensures your keys cannot be copied without approval.

🔑 Massive Keying Capacity – Supports over 1,000 change profiles, making it perfect for expanding businesses or body corporates.

🎨 Easy Key Identification – Durable nickel silver keys with colour-coded inserts for simple team management.

🏠 Built for Australian Conditions – High-quality cylinders, long system life, and wide compatibility.

Whether you’re managing a single property or a multi-site operation, the Sigma X simplifies key control while providing top-tier security.

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Key Hierarchy Made Simple

At Lancaster Locksmiths & Security, we design every master key system around your needs. With Sigma X, we can build a hierarchy that controls access at different levels:

- Staff keys for everyday use.

- Manager keys with broader access.

- A master key for full control.

This structure helps you manage security, maintain accountability, and reduce risks like unauthorised entry or duplicated keys.

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Why Work With Lancaster Security Supplies & Lancaster Locksmiths & Security?

Choosing the right system is only half the solution. Proper design, installation, and ongoing support are essential for long-term success. That’s why we:

- Supply and install Carbine Sigma X across Melbourne.

- Work with homeowners, businesses, schools, and body corporates.

- Provide expert advice to future-proof your system.

- Offer ongoing key management, support, and restricted key duplication services.

When you partner with the team at LL&S, you get more than locks and keys— you get a secure, scalable system that grows with you.

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Take Control of Your Security Today

If you’re considering a new master key system or looking to upgrade an outdated setup, the Carbine Sigma X restricted system is the smart choice for long-term peace of mind.

👉 Learn more about the Sigma X System here

📞 Call us on 0401 008 871
✉️ Email us at info@lls247.com.au

Lancaster Security Supplies is the supply company of Lancaster Locksmiths & Security, feel free to contact us directly and we will help you connect with our knowledgeable team of locksmiths who will help to design, install, and maintain your restricted key system with professional care and attention to detail.