The 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 anti-corrosion resistance even in challenging weather conditions The 12mm diameter hardened boron alloy steel shackle rotates for extra anti-saw protection and ultimate security performance Easy to operate the rekeyable 6 pin anti-bump tumbler locking mechanism features anti-pick technology and offers over 260000 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 Body material Solid hardened steel Security rating CEN grade 4 CRIMESTOPPERS endorsed