One Product Three Uses - The upgraded design inground umbrella base consists of two parts, including a base and ground stake umbrella stand, and can be used in three different ways. The umbrella holder can be used on concrete floors, the ground stake design can also be inserted into lawns, and the included spacer can also be used on granite. One product for multiple uses Adjustable Knob-There are two adjustable knobs on the inground umbrella stand, suitable for umbrella poles with a diameter of 1-2 inches, insert the umbrella into the umbrella tube, you can adjust the tightening according to the size of the umbrella poles, reduce the loosening of the poles and tilting of the umbrella frame Material Durability - The patio umbrella base heavy duty is made of solid metal, the whole is completely covered with black anti-rust powder coating, high hardness, hard and stable structure, not easy to break and deform.Drainage holes at the bottom to prevent water accumulation, prolong the service life, not easy to rust, applicable to outdoor Wide Application - Umbrella base can be easily installed on most material surfaces, can safely lock your parasol, flagpole, windward pole, umbrella sun rope pole, camping tent pole, compatible with poles up to 1.9inch (4.8cm) in diameter. Ideal for decks, docks, beaches, patios, lawns and more Easy to install- The deck umbrella stand comes with three sets of mounting accessories, no need to buy additional mounting accessories to get three mounting methods, can be installed in a few minutes, it's your best choice for outdoor shade. And the umbrella stake anchors won't hurt your lawn and won't hinder your grass growth