Not sure what it was used for but the 2 ends are threaded.
PAIR VINTAGE BRASS DOUBLE ARM CANDLE HOLDERS WALL SCONCES COLONIAL. PAIR OF VINTAGE BRASS DOUBLE ARM CANDLE HOLDERS WALL SCONCES DECORATED WITH A WOMAN, COLONIAL style. 279 IMPRESSED ON THE BACKS. IT MEASURES 5 INCHES TALL AND 6 INCHES IN DIAMETER AT THE TOP RIM.