cylinder lock

cylinder lock
  n.
   any lock that is operated by a cylinder key

Locksmith dictionary . 2014.

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  • Lock bumping — is a lock picking technique for opening a pin tumbler lock using a specially crafted bump key . One bump key will work for all locks of the same type.HistoryIn the 1970s, locksmiths in Denmark shared a technique for knocking on a lock cylinder… …   Wikipedia

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