High security, Heavy duty padlocks for steel gates, shutters, drops, cargo containers, steel or wooden chests, etc. These locks have procession 7 lever security mechanism with more than 50,000 different key variations. These locks have a solid steel alloy shackle with a dual locking mechanism, which provides optimal protection against physical attacks. Inside mechanism is enclosed in a rivet less, reinforced steel body which is protected by heavy nickel plating to obtain greater corrosion resistance for outdoor applications. The steel keys can be taken out in locked as well as unlocked position & the shackle can only be locked with the key.