Relockers Explained
Relockers Explained: How Safe Relockers Protect Your Valuables
Relockers are one of the most important security features inside a safe, yet most buyers have never heard of them. A relocker is a backup locking device that automatically activates if someone tries to break into the safe by force. This guide explains what relockers are, how they work, and why they are essential for burglary protection.
What Is a Relocker?
A relocker is a secondary locking mechanism designed to secure the safe’s boltwork if the main lock is attacked or damaged. When triggered, the relocker blocks the boltwork from retracting, making it extremely difficult for a burglar to open the safe—even if they destroy the primary lock.
In simple terms: if someone tries to break the lock, the safe locks itself even tighter.
Why Relockers Matter
Burglars often attempt to break into safes by:
- Drilling the lock
- Punching or hammering the lock
- Cutting or prying the door
- Trying to knock the lock off the door
Without a relocker, damaging the lock could allow the boltwork to retract, giving the intruder access. With a relocker, the safe remains locked even if the main lock is destroyed.
Types of Relockers
Most quality safes include one or more of the following relocker types:
1. Mechanical (Spring-Loaded) Relocker
This is the most common type. A spring-loaded pin is held in place by the lock body. If the lock is punched, drilled, or knocked loose, the pin releases and blocks the boltwork.
- Activates instantly when the lock is attacked
- Does not require power or electronics
- Very reliable and difficult to defeat
2. Glass Relocker
Found in higher-end safes, a glass relocker uses a tempered glass plate connected to cables or rods. If a drill bit or tool breaks the glass, the relocker triggers.
- Extremely sensitive to drilling attacks
- Triggers multiple locking points
- Very difficult for burglars to bypass
3. Internal Lock Relocker
Some UL-rated locks include their own built-in relocker. If the lock body is tampered with, the internal mechanism fires and blocks the lock from opening.
- Provides an additional layer of protection
- Works independently of the safe’s boltwork
- Common in high-security lock models
How Relockers Work During an Attack
When a burglar attempts to force the lock, one or more relockers activate. Once triggered:
- The boltwork becomes physically blocked
- The safe cannot be opened even if the lock is destroyed
- A locksmith must drill and repair the safe professionally
This dramatically increases the time and effort required to break in—often causing the burglar to give up.
How Many Relockers Should a Safe Have?
The number of relockers varies by safe type:
- Entry-level safes — usually 1 relocker
- Mid-range safes — 1 to 2 relockers
- High-security safes — 2 to 4 relockers, often including glass relockers
More relockers generally mean better burglary protection.
Relockers vs. Re-Locking Boltwork
Some safes advertise “re-locking boltwork,” which is not the same as a true relocker. Re-locking boltwork refers to the safe’s bolt system staying engaged when the door is closed. A relocker is a separate device that activates only during an attack.
A high-quality safe should have both.
Do All Safes Have Relockers?
No. Many big-box store safes and budget models do not include relockers. This is one of the biggest differences between:
- Hardware-store safes
- Professional-grade safes from brands like Hollon and Protex
If burglary protection matters, always choose a safe with at least one relocker.
When a Relocker Activates
If a relocker fires, the safe will remain locked even if you know the combination or PIN. A professional locksmith must drill and repair the safe. This is normal and expected—it means the relocker did its job.
Final Thoughts
Relockers are one of the most important security features in any safe. They protect your valuables by ensuring the safe stays locked even if the main lock is attacked or destroyed. Whether you’re buying a home safe, office safe, or high-security safe, choosing a model with one or more relockers is essential for real burglary protection.