A card lock apparatus is provided. The apparatus has a slot for receiving a key card with a plurality of perforations. The perforations align with a plurality of pins within the house of the card lock apparatus. The pins are moved upward by the inserted card and then urged downward into an aligned perforation. Each pin has a seat for supporting the biasing element and engaging a notch within the actuator. The position of the seat determines whether the actuator is moveable. When all seats are substantially aligned the actuator is traversable to an unlocked position by a manually moveable member. A manually moveable member disengages the device from the enclosure allowing the enclosure to open.