The bottom portion of this bracket has a 2 1/2 inch inner dimension allowing it to slip-fit over any 2 3/8 inch tenon regardless of the shape of the pole. The top portion of the bracket allows shoebox style fixtures with square pole mounting arms to be mounted side by side parallel to each other. Please confirm bolt pattern before buying. This bracket does not work with all mounting arms. This bracket is available with a standard dark bronze finish however other powder coat finish options are available for you to select while ordering.