STURDY & DURABLE Construction --- Manufactured with powder coated steel and designed to safely and easily hold your umbrella Simple Installation – No tools needed, attaches to most deck railings with vertical balusters, vertical balusters must be 3/4" to 3" thick and between 2" to 7" distance Multifunctional - The Patio Umbrella Holder is very suitable for installing torches, flagpoles, umbrellas and other outdoor decorations Space Saving - This set of Umbrella Holder allows provides more suitable space for your deck or patio and does not occupy the space on the deck at all Package Included - 2 Umbrella brackets, 2 baluster clips, 6 mounting screws. Fits umbrellas that are greater than 1" and less than 1 3/4" in diameter