Quiz: Material Strenght

Quiz Friday! Here are some screws from Sven’s bike. They are responsible for holding the stand of Sven’s bike. It’s not a vital part of the bike, but it could be very usefull. It could, but Sven’s bike is heavy, so it doesn’t take long to bend the screws…
Question: How long did it take to bend these screws?
Hint 1: We didn’t bend them on purpose. Hint 2: This happened more than once.
Write your guess in the comments. The winner will get a personal kilometer as well as a place in our Hall of Fame (http://on.fb.me/1JAdFTC). The quiz ends on Monday (00:00 GMT). The winner will be announced on Tuesday(ish). The winner will be drawn at random from all the correct entries.

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