The Master Lock padlocks feature a 45 mm wide laminated steel body for maximum strength and reliability and can be used to lock residential or commercial gates, fences, sheds, workshops, garages, storage lockers, toolboxes etc. The octagonal shackle is 51 mm long, 8 mm diameter and made of Tough-Cut boron-carbide, 50% harder than hardened steel, resulting in maximum resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual ball bearing locking bars provide maximum resistance to prying and hammering. Delivery includes 3 padlocks and 4 keys.