Your Guide to Locks That Can Withstand Almost Anything
When it comes to security, not all locks are created equal. For high-risk applications where ultimate strength and resistance to attacks are needed, only the toughest locks will suffice.
In the world of locks, there are a select few that stand out as truly unbreakable - able to withstand assault from even the most determined intruders armed with powerful tools. These ultra-high security locks achieve the highest ratings from security testing agencies, proving they can resist picking, hammering, cutting, and even angle grinding attacks for extended periods.
What Makes a Lock Strong?
Several key factors contribute to a lock's strength and attack resistance:
- Material - Locks made from hardened steel alloys like boron steel can better resist cutting and sawing attempts.
- Shackle thickness - A thicker shackle, 20mm or more, leaves less space for tools to cut through.
- Number of locking points - More pins and tumblers make picking more difficult.
- Resistance to common break-in tools - Locks must prove they can withstand grinding, drilling, hammering, and other brute force methods.
Lock Strength Rating Systems
There are two major security certification agencies that assess lock strength - the Loss Prevention Certification Board (LPCB) and European CEN.
The LPCB assigns ratings from Level 1 to Level 4, with Level 4 representing the highest security. CEN uses a similar 1 to 10 rating scale.
To achieve the top ratings of LPCB's SR4 or CEN's Class 6, a lock must withstand several minutes of sustained attack from tools including hammers, drills, saws, and battery-powered angle grinders.
The Contenders for World's Strongest Lock
Squire SS100CS Padlock
The Squire SS100CS is widely regarded as the overall strongest lock in the world. It was the first to attain the maximum SR4 and CEN Class 6 ratings.
With its 20mm boron alloy steel shackle and dual 6-pin locking cylinders, this padlock is extremely resistant to cutting and picking attempts. Manufacturer testing exposed it to over 10 minutes of angle grinder attack, proving its mettle.
Abus 37RK/60 Granit Series
German brand Abus's flagship Granit series locks consistently rank among the toughest locks available. Their 37RK model achieves a maximum Class 10 security rating from the demanding Vds standard.
While not rated by LPCB or CEN, these rekeyable locks live up to their "Granit" name - providing unparalleled strength against physical assaults. Their hardened steel and innovative locking mechanisms make them a staple of high-security installations.
Other Notable Ultra-High Security Locks
While Squire and Abus dominate the conversation, other locks like the titanium-reinforced Ivena 24/70 and Mauer's 4KS provide extreme security levels. These receive top ratings from various agencies for cut, drill, and pick resistance.
Real-World Applications
With their unparalleled strength, these locks secure sites like nuclear facilities, military bases, and maximum security prisons. They also protect valuable equipment including ATMs, vaults, and armored trucks and vans from the most determined attacks.
Lock Attack Testing Methods
To assign ratings, labs use established standards to systematically test locks against common break-in methods including:
- Cutting - Powered saws and angle grinders
- Drilling - Battery-powered hammer drills
- Picking - Manual and electric lock picks
- Hammering - Sledgehammers and pry bars
- Thermal - Cryogenic sprays and torches
The ability to withstand minutes of sustained assault from one or more of these tools is the mark of an ultra-secure lock.
When selecting a high security lock, consider your specific risks, budget, and usage needs. In most cases, the extreme protection of a Level 10 or SR4 lock is overkill.
Prioritize key control and rekeying options as well - the strongest lock is useless if duplicates are circulating. Proper installation is also paramount, as a weakly mounted lock can be broken off entirely.
Strong locks ensure that your most sensitive possessions stay protected.