Shalundra, we purchase our mounting brackets and shutter panels from Fortified Shutters or The Window Outfitters. You may also use a piece of 1/4" thick Aluminum L-Bracket (2" x 2"). You can Google various companies across the U.S. that sell aluminun or steel tubing. They will also carry L-Bracket material, also known as angle. You can spray paint yourself or have a local powder coater paint for you. Powder coating is not expensive and the finish will last longer. We hope this helps.

Can you tell me the type of bracket that will connect to the metal railing?

It is called a camel to camel bracket. You may also purchase angle or L-brackets as well.