500 LB EQUIVALENT BASE: Install into concrete or wood decks (hardware included) to secure outdoor umbrellas, sunshades and light string poles; Withstands up to 500 lbs of force with a small footprint compared to weighted umbrella bases; Base weighs 3 lbs PERMANENT IN-GROUND MOUNTING: Mount into concrete or wood pool decks; Professional installation required (instructions included) UNIVERSAL FIT: Holds round pole market umbrellas up to 2.25 inch in diameter; Includes two umbrella sleeves (1.5 inch and 2 inch) to better fit smaller umbrellas; Compatible with sunshade and light string support poles up to 2.25 inches in diameter MINIMAL FOOTPRINT & DESIGN: Small 6.25 x 6.25 inch footprint with unbeatable strength (exceeds 500 lbs of pull) compared to traditional weighted bases WEATHERPROOF: Premium nylon construction is virtually indestructible and rustproof to withstand all weather conditions