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Commercial doors do a lot more than separate rooms or close shop at night. In places like Melbourne, FL, they deal with daily wear from high foot traffic, regular deliveries, employees coming and going all day, and the ever-present Florida humidity that takes its toll on hardware. That’s why choosing the right lock system for a commercial door isn’t just about security — it’s about durability, access control, and long-term reliability.
At Key-En-Lock, one of the brands we trust most for commercial applications is Mul-T-Lock. Here’s why.
What Makes Mul-T-Lock Different
Mul-T-Lock is an Israeli-engineered high-security lock manufacturer that’s been in business since 1973. What sets them apart is their pin-in-pin technology — a patented system where each pin inside the lock cylinder contains a second, smaller pin inside it. This effectively doubles the number of key combinations possible and makes the lock nearly impossible to pick using standard methods.
For commercial buildings, this matters. Traditional pin tumbler locks can be picked by a skilled attacker in under a minute. Mul-T-Lock cylinders are designed to resist picking, bumping, and drilling — the three most common non-destructive attack methods used on commercial properties.
Interactive+ Technology
Mul-T-Lock’s Interactive+ platform takes security a step further by adding a floating pin element inside the key. When you insert the key, this spring-loaded element interacts with a corresponding element inside the cylinder. Without both the correct mechanical cuts AND the correct interactive element, the lock won’t open.
This means you can’t just duplicate a Mul-T-Lock Interactive+ key at a hardware store. Key duplication requires authorization and specialized equipment, giving business owners complete control over who has copies of their keys.
Why Commercial Doors Need High-Security Locks
Most commercial break-ins don’t involve smashing through walls or crawling through air ducts like in the movies. They happen through doors — specifically through locks that weren’t up to the task. Standard commercial locks from big-box stores offer basic security, but they share common vulnerabilities.
Here’s what Mul-T-Lock addresses that standard commercial locks often don’t:
Key control is one of the biggest issues for businesses. With standard locks, any employee can walk into a hardware store and make a copy of their key without your knowledge. With Mul-T-Lock, key duplication is restricted. Only authorized locksmiths with the proper key card can create duplicates, so you always know exactly how many keys to your business exist.
Pick and bump resistance matters because these are the quiet methods thieves prefer. No broken glass, no alarms triggered — just a lock that opens as if the right key was used. Mul-T-Lock’s pin-in-pin design makes these attacks exponentially more difficult.
Drill resistance is built into Mul-T-Lock cylinders through hardened steel inserts that destroy drill bits on contact. Even if an attacker brings power tools, the cylinder fights back.
Master Key Systems for Multi-Location Businesses
For businesses with multiple doors, offices, or locations, Mul-T-Lock offers sophisticated master key systems. This means your building manager can carry one key that opens every door, while each employee’s key only opens the doors they need access to.
The beauty of Mul-T-Lock master key systems is that the high-security features aren’t compromised at any level. Every key in the system — from the grand master down to individual change keys — maintains the same pick, bump, and drill resistance.
Mul-T-Lock for Storefronts and Retail
Retail businesses in Brevard County face unique challenges. Storefronts typically use aluminum-frame glass doors with narrow-stile cylinders. Mul-T-Lock makes high-security cylinders specifically designed for these narrow profiles, so you don’t have to sacrifice security for aesthetics.
For businesses that need to manage employee access during different shifts, Mul-T-Lock also integrates with electronic access control systems, giving you the best of both worlds — physical high-security hardware backed by electronic monitoring and scheduling.
Installation and Retrofitting
One of the best things about Mul-T-Lock is that their cylinders can often be retrofitted into your existing door hardware. You don’t necessarily need to replace your entire lockset — in many cases, we can swap just the cylinder to upgrade your security to Mul-T-Lock’s standards.
This makes upgrading more affordable and less disruptive. We can typically upgrade a standard commercial door to Mul-T-Lock in under an hour without any modifications to the door itself.
Key-En-Lock: Your Authorized Mul-T-Lock Dealer
Key-En-Lock is an authorized Mul-T-Lock dealer and installer serving Melbourne, Palm Bay, and all of Brevard County. We carry the full line of Mul-T-Lock commercial cylinders and can design a master key system tailored to your business.
Our commercial locksmith services include:
- Mul-T-Lock cylinder installation and retrofitting
- Master key system design for single and multi-location businesses
- Key control programs with restricted duplication
- High-security lock upgrades for storefronts, offices, and warehouses
- Emergency commercial lockout service — available 24/7
Whether you’re opening a new business, upgrading from standard locks, or need to rekey after an employee change, Mul-T-Lock gives you the security and control that commercial properties demand.
Ready to upgrade your commercial security? Call Key-En-Lock at (321) 224-5625 for a free consultation.
