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Above is referred to as the "button" style socket. Below is an example of the wrong type.Above is referred to as the "button" style socket. Below is an example of another type.There is another style that is referred to as the snap-in tombstone style socket. It is the wrong type for my box sign. Please ensure that the correct button style part is ordered as opposed to the incorrect tombstone style socket.There is another style that is referred to as the snap-in tombstone style socket.