The lock mechanism called pin-tumbler lock uses pins of different length to avoid the lock from opening without correct key. In the absence of key the driver pins are pushed downwards by the springs preventing the plug from rotating. The pin stacks are raised to correct altitude once the genuine key is inserted. The split between the key pins and the driver pins align with the edge of the plug or shear line. When the gaps between the pins are aligned with the shear line, the plug can rotate freely. Opposite to this pins are not aligned with shear line and the plug will not turn on the insertion of wrong key.
Lock picks are the tools to manipulate the pins in a lock. There are many methods possible to pick up a lock, but traditional methods used by professional lock picker are
