Cylinder use pins of varying lengths to prevent the lock from opening without correct key. The pin tumbler is commonly used in cylinder locks. In this type of cylinder lock, an outer casing has a cylindrical hole in which the plug is housed. To open the lock, the plug must rotate.

GMB cylinder offers different material including brass, zinc, and aluminum. The BSI certified cylinder has superior safety function in anti-snap, anti-bump, anti-pick and anti-snap.

Cylinders usually come in Euro profile or oval shape in different size and lengths. The surface color can be customized according to different requirements.