The combination lock on the padlock or the box can have only one turntable. The turntable pushes several balance discs or cams on the back. It is customary to turn the dial clockwise to the first digit when opening this lock, and then turn the dial to the second digit counterclockwise, and so on to the smallest digit. There are usually recesses on the cam. When the correct code is transferred, the positions are aligned and the lock can be opened.
This kind of combination lock is more secure.