What is the World's Strongest Padlock?
Squire SS100 and SS100CS – Unrivaled Security and Durability
For high-security needs across industries, the Squire SS100 and its closed shackle version, the SS100CS, stand out as the strongest production padlocks available today. Trusted globally by military, industrial, oil and gas, and utility sectors, these padlocks offer unmatched resistance to physical attacks, weather, and corrosion. Their exceptional durability and certifications have solidified their reputation as top choices for securing high-value assets.
Built to Last: Design and Construction of the SS100 and SS100CS
The Squire SS100 and SS100CS padlocks belong to Squire’s Stronghold® range, drawing on over 240 years of lock-making expertise. These padlocks feature a solid, hardened steel body weighing 4.3 kg and a 100mm width, designed to withstand harsh conditions and physical attacks. The SS100CS closed shackle is crafted with a 20mm hardened boron alloy steel shackle, highly resistant to bolt cutters, drills, and other tools. This closed design further enhances security, making the SS100CS ideal for environments where assets need the ultimate defense against theft and vandalism.
Unmatched Security Certifications
One of the few padlocks to achieve LPCB Level SR4 and CEN 6 ratings—the highest security standards available—the SS100CS is rigorously tested to endure sustained attacks. In addition to these elite ratings, the SS100CS, when paired with a compatible 22mm high-security chain like the Squire Behemoth, is Sold Secure Motorcycle Diamond approved. This means it can withstand dedicated assaults from angle grinders, hammers, and drills, making it a top choice for environments where intruders may have extended time to breach locks.
Dual Key Mechanism for Advanced Security
The SS100CS features a dual key mechanism with two 6-pin cylinders, offering 625 million possible key combinations. This advanced system is not only difficult to pick but provides flexible access configurations, including keyed alike, keyed to differ, or master keyed options. Both cylinders must be unlocked to open the padlock, creating a double layer of protection ideal for high-security environments.
Corrosion Resistance and Durability
Built to endure the toughest conditions, the SS100CS includes an electrophoretic anti-corrosion finish and a storm-proof cover for added protection against extreme weather. Its design makes it ideal for industrial, marine, and outdoor applications, where exposure to salt, moisture, and dust often degrades typical locks. This resilience ensures longevity, providing a dependable solution in high-risk locations.
Applications: Securing High-Value Assets in Demanding Environments
The SS100 and SS100CS are ideal for high-security applications, such as warehouses, perimeter gates, shipping containers, and restricted-access facilities. Their formidable resistance to brute force attacks and weather makes them especially suitable for locations with limited oversight, where intruders might have time to attempt access.
Why the Squire SS100 and SS100CS are the World’s Strongest Padlocks
With over two centuries of experience, Squire has created the SS100 series as the pinnacle of padlock security. As the only padlock to achieve LPCB Level SR4 and CEN6 ratings, the SS100CS is truly the world’s strongest padlock, trusted across industries requiring unbeatable security solutions. Combined with dual-key access, high-grade materials, and rigorous testing, the Squire SS100CS offers the highest level of padlock protection available.
For any high-stakes, high-security needs, Squire SS100 and SS100CS padlocks provide unparalleled protection, proving themselves in rigorous real-world conditions and setting a new standard in padlock security.
