Renowned for their extreme strength, Kasp 190 series padlocks have been designed and manufactured in accordance with the stringent internationally recognised Central European Norm specifications. The closed shackle version conforms to BS EN 12320:Class 6, the highest grade within the Central European Norm security standard, ensuring it is the most secure padlock available today.Precision crafted from a solid block of high grade hardened steel, weighing over 1.5kgs (3.3ibs) the rekeyabl, drill resistant 6-pin cylinder featuring anti-pick pins is designed to resist intelligent picking and manipulation methods, whilst the 14mm hardened boron steel shackle is secured in the locked position by 2 ball bearings,universally accepted as one of the most secure locking mechanisms available. 10 year guarantee.