A master key system allows different locks within a building to operate on individual keys, while a single 'master' key can open all or selected doors. This gives businesses much better control over access, especially when managing staff, contractors or multiple entry points.

It reduces the number of keys needed, helps maintain internal security and simplifies daily operations by letting managers access areas without carrying multiple keys. Master key systems can also be customised—such as restricting certain areas to specific staff—and expanded over time as the business grows.

Commercial locks often show signs of wear long before they fail completely. Difficulty turning keys, sticking latches, loose handles or inconsistent locking are early indicators that the hardware may be deteriorating. Businesses should also consider upgrading if their locks are more than a decade old, installed with outdated technology or no longer meet insurance or compliance requirements.

Improvements in digital security, electric strikes and heavy-duty commercial hardware mean modern options can provide better durability, smoother operation and stronger protection. Regular maintenance checks also help identify issues before they become emergencies.

Improving commercial security usually starts with reinforcing entry points. This includes upgrading locks to commercial-grade hardware, adding electric strikes or access control systems and ensuring all external doors and frames are correctly installed and aligned.

Master key systems can help streamline access while preventing unauthorised entry. Additional measures include installing high-quality window locks, using blocker plates to protect vulnerable latches and updating older digital systems to newer, more secure models. For many businesses, a combination of strong physical hardware and controlled access works best, offering convenience without compromising safety.