Patio Umbrella Holder for Deck Railing allows you to enjoy instant shade on your deck or balcony without drilling holes Allows for quick and easy installation and removal, making it ideal for creating portable shade wherever you need it Crafted from heavy-duty rustproof steel, tough enough to withstand outdoor elements Frees up valuable floor space, fits poles up to 1 1/2' in dia., railing grille width from 1 7/8' to 4 5/16' and railing thickness up to 3 5/8' Ideal for deck railing, balcony, carts