Model of a modern signal mast with a platform and ladder, as used on most modern North American Railroads. This particular mast is for Left-Hand placement (left hand running).
This set contains 12 signal masts with each 3 "Darth Vader"-type color light signals on a small sprue so you can paint it separate from the rest of the mast. Remove the sprue from the concrete mast base, and remove it from the signal. Paint the mast aluminium and the signal black and glue the mast onto the bracket, letting the bottom light case rest on top of the bracket.