To open this lock, insert the key and turn counterclockwise to a point two (photo 2 ). Then, you need to pull the key to itself until it stops. After that, turn to a point three (photo 2 ). Then you need to press the key until it stop. After that, you can turn the key and open  lock. The trajectory of  key shown in the photograph (photo 4 ). The lock can be locked in two positions. Half-locked, can be used as a standard padlock. Fully locked, complete with a chain or cable can be used to close the gates, etc.
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Padlock  with trick. Side view.
Padlock  with trick.The trajectory of the key.
Padlock  with trick.Key.
Padlock  with trick.
Padlock  with trick.
Padlock  with trick.The trajectory of the key.
Padlock "Clothespin"
With trick