Unlocking a door with a paperclip is an easy but efficient method that may come in useful in emergency conditions when you do not have entry to a key. This technique works on doorways which have a typical pin tumbler lock, which is the commonest kind of lock present in properties and workplaces.
The trick is to make use of the paperclip to push the pins contained in the lock cylinder into the right place, permitting the lock to show and the door to open. Whereas it might sound daunting, with a little bit of persistence and apply, anybody can grasp this method.