The bottom portion of this bracket has a 2 1/2 inch inside diameter allowing it to slip-fit over any 2 3/8 inch tenon regardless of the shape of the pole. The top portion allows shoebox style fixtures with square pole mounting arms to be mounted side by side parallel to each other. Custom drill patterns are available. This bracket is available with a standard dark bronze finish however other powder coat finish options are available. Hot dip galvanizing is also available as a custom request.