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.

ASSA ABLOY, the global leader in access solutions, wholly owns Mul-T-Lock. 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

  • Over 40 years of experience, cutting-edge technology and 100’s patents on lock/key technology to keep you safe and free from unauthorized duplication.
  • They patented Key control systems. With strict factory key control regulations, Mul-T-Lock’s Key Control Systems are engineered to prevent unauthorized key duplication. Duplication of Mul-T-Lock keys is only possible at authorized service centres on Mul-T-Lock key cutting machines.
  • Tamper resistance. Mul-T-Lock products are designed to withstand many forced entry attempts, from picking, bumping or drilling. Mul-T-Lock’s unique telescopic pin tumbler mechanism will defeat even the most experienced lock picker. Ten and eight-pin cylinder designs enhance the level of security by requiring a dual shear line match for the cylinder to operate. Plus, each cylinder incorporates hardened steel inserts in strategic areas to offer a high level of drill resistance. Also, advanced protective elements such as mushroom and split plug pins, interlocking telescopic pins and strict key control procedures eliminate the threat of bumping.
  • Single key multiple-use solutions. While Mul-T-Lock produces many types of keys and locks for complex situations, they also offer one key solutions to make your life easier. With one Master Key, open your filing cabinet, server room, tool shed and office door with one Key on your ring.
  • Versatility. No job is too large or small for Mul-T-Lock. The vast product line extends to both foreign and domestic locks, padlocks, and cylinders. High-security locking solutions for Canadian, American, Scandinavian, Japanese, and French locksets, which can be incorporated into a single keying system, are just part of Mul-T-Lock’s impressive product portfolio.


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 the 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 special 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 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 lets you know that only persons authorized by the owner can order extra 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 protection, 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.

  • ANSI Grade 1 Locking Mechanism and Design
  • UL Fire Rated, Hardened Steel Bolt
  • UL437 Drill, Pick, and Bump Resistant Cylinder
  • MTL800 or MTL600 Key Control System
  • Standard and decorative styles available
  • Available in Single cylinder, Captive Key, and 3-in-1 cylinder configuration
Hercular Deadbolt - Grade 1
Hercular Deadbolt - Grade 1
Cronus Deadbolt - Grade 2

Cronus – Grade 2

The Cronus deadbolt is the younger sibling of the Hercular deadbolt. Offering many benefits like the Hercular, the Cronus is bump, pick, and drill resistant, allowing for extra key security. In contrast, 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.

  • ANSI Grade 2 Locking Mechanism and Design
  • UL437 Drill, Pick, and Bump Resistant Cylinder
  • MTL600 or MTL300 Key Control System
  • Available in Single cylinder and 3-in-1 cylinder configuration