3 Levers Union Deadlock
• 3-lever internal mechanism provides enhanced pick and manipulation resistance
• Hardened steel deadbolt extends 20mm+ for deep, secure engagement into the frame
• Mortice installation offers superior strength and a clean, integrated appearance
• Reinforced anti-drill plate protects the key mechanism from drilling attacks
• Durable zinc-plated steel case withstands physical force and corrosion
• Conforms to relevant security standards
• Supplied with multiple restricted keys to prevent unauthorized copying
• Ideal for securing external wooden doors in residential and commercial settings
• A trusted, traditional high-security lock from a reputable brand
• Essential core component of a comprehensive door security strategy

About 3 Levers Union Deadlock

Secure your home with the robust and reliable protection of the 3 Levers Union Deadlock. This high-security mortice deadlock is engineered for maximum resistance against forced entry, making it an essential component for front doors, back doors, and external wooden doors. The “3 Levers” refers to its internal mechanism—three separate steel levers that must be precisely aligned by the correct key before the bolt can be thrown.

This sophisticated system offers significantly more pick resistance than simpler mechanisms. The 3 Levers Union Deadlock features a hardened steel bolt that extends deep into the door frame (typically 20mm or more), a reinforced anti-drill plate to protect the cylinder, and a sturdy, zinc-plated steel case for durability. Designed for mortice installation (recessed into the edge of the door), it provides a clean, integrated look and superior strength compared to surface-mounted locks. Trusted by homeowners and locksmiths, the 3 Levers Union Deadlock is a cornerstone of physical door security.

What is a 3-Lever Mechanism and Why is it More Secure?

A 3-lever mechanism uses three independent, spring-loaded metal levers inside the lock case. Each lever has a “gate” that must be lifted to a specific height by the cuts on the correct key. Only when all three gates are perfectly aligned can the bolt be moved. This makes the 3 Levers Union Deadlock much harder to pick or manipulate with tools than a basic 2-lever or warded lock, as it requires precise, simultaneous alignment of multiple components.

What Does “Mortice” Installation Mean?

“Mortice” installation means the lock body is recessed into a pocket (a mortise) cut into the edge of the door. This integrated installation makes the 3 Levers Union Deadlock far more secure than surface-mounted locks. It is hidden within the door, protected from direct attack, and its strength comes from the door material itself. Professional installation is recommended to ensure the mortise is cut accurately for optimal performance of your 3 Levers Union Deadlock.

Is This Lock Suitable for a Front Door?

Yes, the 3 Levers Union Deadlock is an excellent choice for front doors when used as part of a multi-point locking system or alongside a high-security night latch (rim lock). As a primary deadlock, it provides a strong, key-operated bolt that forms the core of the door’s security. For ultimate protection, it should be used in conjunction with other security measures like hinge bolts and a solid door frame.

How Many Keys are Provided and Can More Be Cut?
The 3 Levers Union Deadlock typically comes supplied with **3 to 5 keys**. It is crucial to keep one key in a safe place as a backup. The keys are usually **restricted** or of a specific profile, meaning they cannot be copied at a standard key-cutting kiosk. Additional keys for your 3 Levers Union Deadlock must be ordered from a locksmith using the unique key number provided, enhancing security by preventing unauthorized duplication.

What Door Thickness is Required?
The 3 Levers Union Deadlock is designed for standard wooden doors. Common case sizes fit doors between **35mm and 45mm** thick. It is vital to measure your door’s thickness before purchase to ensure the lock case will fit correctly within the mortise without compromising the door’s structural integrity. Using the wrong size can severely weaken the door.