The pick gun operates using the percussion principle. Here, the pins in the cylinder are briefly pushed into the core as a result of the rapid upwards and downwards movement of the pick gun attachment. Now that the core pins as well as the housing pins release the cylinder, the lock can be opened.
At exactly this point in time, the cylinder is tensioned using the tension tool (imitating the key movement). This way, the pins cannot return into their original position and the lock is open. Depending on the lock, opening takes a few attempts only.