The pole mount adapter is used for mounting a Signal Mate Anchor, Tri Color/ Anchor, Steaming or the Steaming/ Anchor combination LED navigation lights on a pole. Made of machined Black Delrin plastic. Includes stainless steel 1/4 20 x 1 1/4 inch cap screw and three stainless steel set screws to secure the adapter to the pole. Will fit 1/4 20 female threads on the bottom of all Signal Mate lights.