European ASSA 600 (like TWIN 6000 but no sidebar) locks have the same security pins. They are almost unpickable. I think the plug has some kind of unusual extra drillings so once the security pins false set their borders rest in these extra cuts. Pushing the pins does NOT make the plug turn back no matter how hard you try.
The only possibilities would be to use *ultra* light tension or trying to use the tensioner to rotate the plug backwards manually... still a p in the a.
I wonder if this issue has been covered on here? And whether all standard ASSA/RUKO locks behave like this? What about this one?
