Abstract: A lock assembly, for securing an adjusting screw engaging with a frame of a car to a car light optical block to lock the optical block to the frame of the car, including a female member connected to the optical block having at least one aperture formed therein and a male member having a first portion and a second portion. The first portion is insertable in the aperture of the female member and includes a locking mechanism for locking the male member to the female member. The second portion includes a receiving mechanism for receiving an end of the adjusting screw. A second locking mechanism is provided for locking the adjusting screw in the receiving mechanism.