Asymmetrical locking cylinder belongs to the category of double cylinders.
This refers to locking cylinders whose inner and outer sides have different length characteristics.
Characteristic of the designation are the dimensions: 25/35 mm, 26/26 mm, 26/30 mm, 27/27 mm, 27/35 mm, 28/30 mm
The inner side can usually be supplied in a longer version, depending on the system.
Example lock cylinder
Example asymmetrical locking cylinder