 In order for the lock to operate, the key must be fully inserted, allowing the dual sidebars to enter the pins, provided the pins were raised to the correct height, thereby freeing the cylinder core for rotation.The cylinder does not use the traditional top- and bottom-pin combination, relying instead only on the holes in the side of the pins and pressure applied by the 12 springs above.Many pins have a dummy hole which will trap the sidebar pin if any turning pressure is applied to the lock with the pin in the incorrect position, preventing the lock from opening.