Features: Brand new and high quality Equipped with four knobs, so that the outdoor umbrella will not appear gaps loosening, umbrella frame rod sliding and umbrella frame tilts, and other problems. Adjustable range: Φ1.12''-1.57'' The bottom design is suitable for mounting on concrete and lawns, and comes with all the required mounting accessories. Umbrella bases brackets can also be used for residential and commercial use This umbrella bases stand works great for decks, docks, pontoons, patios, picnic tables, and any place else you can fast with the included lag screws. This deck mount umbrella holder is made of a heavy-duty metal bases for durability. No rusting. Specifications: Material:Metal Size:Approx.7.08x7.87inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Deck Umbrella Mount Equipped with four knobs to prevent gaps, loosening, sliding, and tilting of the umbrella frame Adjustable range: Φ1.12''-1.57'' for versatile compatibility Designed for mounting on concrete and lawns, includes all necessary mounting accessories Suitable for both residential and commercial use Ideal for decks, docks, pontoons, patios, picnic tables, and more, with included lag screws for secure fastening