STYLISH BACKYARD COMPLEMENT: This base completes your patio umbrella for a simple yet elegant addition to any backyard or garden HEAVY-DUTY STEEL: Made of heavy-duty steel with a powder-coated finish, this anti-scratch base can maintain an attractive appearance for years to come THE PERFECT FIT or 3 CAP SIZES: Strategically equipped with a twisting knob on its side to tightly secure umbrella poles between 1.5 and 2 inches in diameter to the base EASY ASSEMBLY: Set this base up in no time by performing three simple steps: add the bolt before inserting the metal plate and screwing in the knob ANCHOR HOLES: An anchor hole is drilled into each corner of the base so you can easily secure it to your wood deck or patio and help ensure a balanced umbrella