Umbrella Clamp, Umbrella Holder, Fixed Clip for Beach Patio, Black. Description: The large, strong clamp can be hooked onto any surface (0-2.4 inches) and can be attached to bleachers, benches, tailgates, boats, posts, fences, and more. The 1.5-inch diameter tube with a thumbscrew securely holds the umbrella and allows you to adjust the height. Quick and easy installation; use for umbrellas, flags, and fishing rods. You can adjust the hole diameter by tightening the screw. The maximum thickness it can clamp is 2.4 inches. If you are looking for a replacement for a large, heavy umbrella holder, this is definitely your smart choice. Designed to provide instant and convenient shade. Perfect for covering barbecues, sporting events, outdoor work, and other recreational activities. Specification: Material: Stainless steel Umbrella installation opening diameter: 3.8 cm / 1.5 inches Size (LxWxH): 3.94 x 3.94 x 6.1 inches Package includes: 1x Umbrella stand Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurements.