A padlock is a specific type of lock that is usually portable and typically used to secure objects or spaces that are not permanently fixed, such as gates, lockers, and storage units. It consists of a U-shaped shackle, a body, and a locking mechanism.

This design shows you how a Padlock works and how you open them.

Esport Pro Gamer, Game Analyzer & Designer. 

Its locking and unlocking mechanism is very interesting and amazes me
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The design inside the lock is interesting
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I have never seen the internal design of the lock
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Thanks for useful information 
195 $DEGEN for you