DUO High Security locks

[omelet]

that sounds vaguely familiar.

[omelet]

Looks like I won't be taking pics for a while, oh well.

Beekeypr gives a good explanation about how it works: the key pulls the wafers into the plug so it can turn past the wards in the side of the shell. So, when you remove the plug, if you put the key in first, the wafers and all stay together in the plug without risk of losing them or mixing them up.

The wafers come in pairs and have a small spring on one side pushing them partially out of the plug at rest. The secondary wafers also come in pairs but one of the wafers in each pair does not extend past the plug.

The primary wafers have a rectangular hole within that when a pair is lined up with each other and the key, the edges of them will be flush with the outside of the plug.
The secondary wafers have a hole conrresponding to the warding on the front of the lock as well as the side milling of the key.

The secondary wafers operate in the same way as the primary wafers in that they are pulled into the plug to let it turn. The difference is that the top wafers are wider than the ones from the primary set. The only function i can see that the bottom wafers of the secondary set serve is to have something for the springs to push against.

This wideness of the secondary wafers is the reason why, when I picked this set of wafers, the plug turned significantly. So, unlike the case with mushroom pins, this is a good sign. Unfortunately, it is the easy part.

Because the wafers are connected by springs, if you set one side of the primary wafer pair and try to set the opposite side, the pressure you put against it will work via the spring to unset your already set wafer and push it out of the plug.

Now I know the workings of this lock I will continue to try to pick it open. I am not sure if just trying to set the primary wafers gently after setting the secondary ones will eventually work, but I forsee it being a PITA. I don't believe using shims would work becuase there is quite alot of room inside of the shell for the shims to move around in, so they wouldn't be able to hold the wafers in place.

I hope this helps and was accurate enough. I don't have access to a camera right now, but maybe in a few weeks when I do, I can take some pics if anyone wants.

[omelet]

I forgot to mention the arrangement. The wafer pairs are arranged every other kind: primary and secondary. There are 5 primary and 4 secondary.

[omelet]

i took some nice pics of this for you to check out

This shows the empty cylinder. The things on the sides prevent the rotation
when locked. There is also a small bit of metal on the front at the bottom that i think
beekeypr mentioned.



Here is the removed plug from the side angle with key inserted.



Here is the removed plug from the side angle without key. You can see the
double cuts on the bottom of the key.



Here you can see how the secondary wafers are situated between the primary ones
and extend wider at the top than the others.



Here is a primary wafer pair as they sit inside the lock.



Here is a primary wafer pair dissembled.



Here is the secondary wafer pair dissembled. Note the wide part at the top of
one and the wierd shape of it. the shape corresponds to the warding in the front of
the lock and the side cut on the key.