High-Security Locks

Mul-T-Lock Authorized Dealer

High Security You Can Trust

With Mul-T-Lock, you know you are in good hands. Mul-T-Lock is an international brand that allows you to buy a patented cylinder platform through a global, authorized dealer network.

Keys from High Security Locking solutions

Mul-T-Lock® has chosen PROTECTION PLUS® as our trusted partner to provide high-security door lock services for our residential clients. For over four decades, Mul-T-Lock has been a worldwide leader in developing, manufacturing, and marketing High Security locking products and security solutions for the residential market.

Mul-T-Lock is wholly owned by ASSA ABLOY, the global leader in access solutions. From security locks to security doors, entrance automation and access control systems, ASSA ABLOY has an annual turnover of $8.7 billion and employs approximately 49,000 people worldwide.

Why should you as a consumer choose PROTECTION PLUS and Mul-T-Lock Toronto


MTL™800 Mul-T-Lock’s


With your needs in mind, Mul-T-Lock’s premium cylinder platform is designed for supreme protection, flexibility, and convenience. MTL™800 meets high international standards to offer enhanced resistance to picking, drilling, bumping and other lock manipulation, so your home always remains secure.

State-of-the-art patented technology.
MTL™800 integrates a combination of protective elements to create a triple locking mechanism.

MTL™800 contains a new double Alpha spring, a new plug pin made of two separate parts replacing the solid pin of the current MT5®+ design, and a new loading system. Many existing high-security features integrated into current MT5®+ are already leading the locking solution industry, so they were not modified for the new product release.

MTL™800 supports large and complex master key systems, and advanced key copy requirements, even within the same suite. Its milled pattern can create exclusive keyways, providing home and business owners the flexibility they need to meet their specific needs.

MTL600 superior protection locking solution

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The MTL600 superior protection locking solution provides you with the high security you need and the enhanced key copy control you desire.

The combination of several technological elements creates strong resistance against different forms of lock manipulation.

The MTL600 mechanical platform addresses High-Security concerns while responding to functional needs.

Building on four decades of extensive experience and the MTL600 key platform’s proven technology and global success, MTL600 utilizes patent technology for enhanced High Security.

Using advanced technology, Interactive+ combines an enhanced variation of the telescopic pin mechanism with a unique patented floating element to meet the highest security standards.



With MTL™300, you can enjoy a high-security patented locking system developed by a worldwide leader – at an affordable price.

Based on the combination of existing field-proven technologies, this patented cylinder platform offers peace of mind against all forms of cylinder attacks.

Ideal for residential and small-to-medium business customers, MTL™300 is an entry-level locking solution that goes beyond the standard, offering advanced, patented technology and protection that complies with international standards. The platform is patented, and a restricted key copy system enables locksmiths to access exclusive keying profiles using six special cut types while guaranteeing protection against unauthorized key duplication.

MUL-T-LOCK Key Copy Control System

Enhanced Key Copy Control

All Mul-T-Lock mechanical products come with a unique card that should be presented to PROTECTION PLUS along with a piece of photo ID when additional keys are needed. This key control system gives you peace of mind that only persons authorized by the owner can order additional keys, and keys can only be copied by PROTECTION PLUS.


Hercular – Grade 1

The Hercular deadbolt is Mul-T-Lock’s flagship deadbolt locking solution. Its unique design allows for security in almost every way. Bump, pick, and drill-resistant cylinders allow for extra key security, while its unique steel ball-bearing bolt mechanism and hardened steel inserts give it physical strength. The Hercular deadbolt will stop at nothing to deny unauthorized access via forced entry.

Hercular Deadbolt - Grade 1 Hercular Deadbolt - Grade 1

Cronus Deadbolt - Grade 2

Cronus – Grade 2

The Cronus deadbolt is the younger sibling to the Hercular deadbolt. Offering many benefits like the Hercular, the Cronus is bump, pick, and drill resistant allowing for extra key security, while the solid brass bolt with a hardened steel insert allows for extra physical strength. The Cronus deadbolt is ideal for residential and light commercial applications with its ANSI Grade 2 commercial rating.