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.