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

Kabrus Small Alarmed Padlock for Garden Shed / Storage Sheds / Door Locks / Home Security Gate Alarmed Padlock / Alarm Lock for All types of Garden Sheds / Small Garden Alarm Lock / Can be Used Armed and Unarmed $21.99 Kabrus Multi-Purpose Small Alarmed Padlock: The Uses of this lock ranges far & wide. This is a Smart Alarm Locking device Ideal for All types of Garden Sheds, Home doors, gates, garages. Specially designed to fit Small Garden Sheds and Storage Sheds. It fits almost all types of Garden Sheds. This Lock can be used unarmed or alarmed. When the lock is armed, a single beep will be heard. This Multi p…