We think we know everything about the objects around us, but we don’t always. Often, in fact, commonly used products hide small details which can make a difference. This is the case with padlocks which, used in a variety of situations, from the closing of lockers to the protection of bicycles or freight containers, can present particular details which are an indication of their security or functionality.
Q&A: What is the tiny hole in a padlock for and 3 more curious facts!
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