You use a torque wrench to turn the bottom chamber slightly, then you push up on the a pin until it sets. What does it mean to set? It means the top pin gets stuck in the top chamber, resting on the bottom chamber. Rinse an drepeat until the dividing line in the middle is clear, and the lock opens. This can happen because the holes in the chamber aren't drilled in a perfectly straight line, and lockpickers take advantage of it