High security, Heavy duty pad locks for steel gates, shutters, aldrops, cargo containers, steel or wooden chests, etc. These locks have precession 7 lever security mechanism with more then 50,000 different key variations. These locks have a solid steel alloy shackle with dual locking mechanism, which provides optimal protection against physical attacks. Inside mechanism is enclosed in a rivitless, reinforced steel body which is protected by heavy nickel plating to obtain greater corrosion esistance 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. Models available are Classic-65, Classic-55, Classic-55 long shackle.