| Locking
cylinders, which can be opened from the inside at any time,
should always be used whenever there is a danger of people
being locked in accidentally.
In cellars, laboratories, rooms which, in many cases,
are further away from the most frequently used areas and
which normally have to be kept locked.
Knob cylinders are profile
double cylinders, which are equipped with a knob on the
inside. This knob can be used to open and lock the door
at all times, even if a key is inserted into the keyway.
This means that a way out is
always guaranteed.
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