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Mauer sure has/had some interesting products to offer. I must
admit I like it when people think outside the box. And that is what
the engineers of Mauer did when designing some of their locks. The
keys to some of their models are twice as long as conventional keys.
That is because they run trough both sides of the core on a euro
profile cylinder. That is right, pins on both sides of the lock have
to be in the right place before the lock will open. This improves
security quite a lot. Picking becomes very hard since all standard
picks are way too short. Using a pick gun? Forget it.
Can they be bumped? I think so but have not tried …
The first generation of these locks made use of an ordinary key. The
big disadvantage was that the keyway on the inside was a mirror image
from that on the outside. In order to lock the door from the inside a
smaller key was used (only 5 pins), that would not even fit the front
of the lock since that keyway was a mirror image.
Later models used dimple key. This was a symetric keyway, and the long
key that would close the lock from the outside could also be used on
the inside.
I am sure Han Fey will write an article about these magnificent locks
someday. Until then you will have to live with these images (zip 7Mb)
Currently (in Europe) burglars have tools and techniques to break your
euro profile cylinder in half. These Mauer locks are protected against
that too. If you take a good look on the image above you can see they
‘pre cut’ the lock. If someone tries to break the cylinder only 50% of
one side of the lock will come out. A second try will release another
25% but leave the lock intact and closed. So picking or breaking the
first part of the lock will not do you any good.