For use with Atlas Code 55 N Scale Turnouts. Mounts out of sight, underneath your layout benchwork. Includes a double-pole, double-throw relay with actuating mechanism to actuate other accessories (such as panel indicator lights, reverse loop circuits or other turnouts) of your choice. It can face in either direction for ease of use. The Code 55 switch machine is part of the Atlas N Scale Code 80 and Code 55 track line.