Ideal for both indoor and outdoor usage, use this Master Lock Zinc Heavy Duty Padlock to secure self storage units, sheds, trailers, moving trucks, vans and more 10,000 possible combinations of this lock with a 4-digit set-your-own combination system Tough-Cut octagonal boron-carbide shackle of this padlock is 50% harder than hardened steel Deadlocking mechanism of this padlock protects against prying, shimming and rap attacks thanks to its large ergonomic dials with exclusive blind dial Operate with gloves on, in low light or complete darkness Padlock has a reinforced body bumper protects against scratches The hinged dial cover and shackle seal of this padlock offers superior weather protection