When every disc is set to the correct position, the core doesn't rotate. There are no magnets or special features on the key.
On the bottom is some kind of a ball, but it will not move.
To try something, I filed down a little bit from the tip of the key, but not enough so that the key won't work.
With this modified key the lock does not open.
It seems that the ball is pushed into the core after 90° and in case there is no material that pushes the ball back out of the core - it blocks. But this is only what I guess.
Anyone who has experience with this lock?