C.K Hardened Steel Padlock is rated Class 5 for BS EN 12320 for superior security - amongst the most secure padlocks available. The hardened boron alloy steel shackle, double ball bearing locking mechanism, 6-pin cylinder with anti-pick mushroom pins and paracentric, drill-resistant keyway provide effective protection from attacks, picking and manipulation. The pearl nickel plated hardened steel body provides enhanced strength and corrosion resistance. C.K High Security Hardened Steel Padlock is highly secure and 70mm in width.