Anti-break cylinder

An anti-break cylinder is designed so that, if someone breaks it, the door stays shut. Many burglaries on doors with euro cylinders are carried out by snapping the cylinder at its centre, which is its weakest point.

The usual solution is a planned break line on the outer part: if it is forced, it snaps there, and the inner part, with the cam and the mechanism, stays intact and locked. Some models add steel parts that jam the cam when they detect the break.

It is often confused with the anti-snap cylinder; in practice many manufacturers use both names for the same protection.

For it to work, the size matters: the outer side has to sit flush with the escutcheon. Check how yours sits or send us a photo, and we will suggest one of the right security cylinders.