The Henry Squire WS75S Stronghold Container Block Lock is a high security container lock with tamper proof technology, purpose designed for extreme resistance against the threat of a sustained attack. It has a 80mm solid hardened steel lock body with a electrophoretic finish for excellent anticorrosion resistance, even in challenging weather conditions. The 12mm diameter hardened boron alloy steel shackle rotates for extra antisaw protection and ultimate security performance. Easy to operate, the rekeyable 6 pin, antibump, tumbler locking mechanism features antipick technology and offers over 260,000 key variations. Specification Body width: 80mm.Body thickness: 25mm.Shackle diameter: 12mm.Vertical shackle clearance: 14mm.Horizontal shackle clearance: 27mm.Overall height: 65mm.Shackle material: Boron steel.Mechanism: 6 pin tumbler.