Who makes the strongest locks?

Hello, really all I ever hear about is MasterLock. Are they really the best? Most hard? They supposedly have six different levels of security, but according to whom? I think that there would be a company or website out there that regardless rates and objectivity of various locks, etc., but I can not find one! Help!

When I did an Internet search for the strongest padlock World Abuslocks.com found. They say: The strongest of pin-lock glass available more than 19,000 pounds of tensile strength Freon 65 Rockwell-hardened core proof lock body and shackle aerosol specified in the Class 3 security for the world's most demanding, Law Enforcement agencies and insurance companies Tops ASTM standards 3 "shackle available

3 x Kabrus Smart Multi-Purpose Alarmed Padlocks / Security Siren Alarm Padlocks for Home, Garden, Garage, Garden Sheds, Greenhouses, Bikes, Motorbikes, Motorcycle, Vehicle Trailers, Equestrian and much More (PACK OF 3 LOCKS) $72.00 Each lock is pre-fitted with 6 LR44 batteries. You will also get a pack of Kabrus batteries FREE (12 battery pack). This lock can be used as an Ordinary Padlock Unarmed or Alarmed by simply taking out the shackle and inserting it back into the lock the other way round . When the lock is Alarmed a single Bleep will be heard. Once armed it has a unique program that controls the sensitivity, this is …