【Quality Materials】This deck mount umbrella holder made of heavy duty Q235B carbon steel,very strong. The surface is treated with black powder coating, suitable for outdoor and indoor,rust-proof. 【Space Saving Desing】This umbrella stand can be mounted directly to a deck railing or balcony to save valuable floor space. 【Suitable for 1.1-1.6 inch umbrella poles】Our umbrella stand has an inner diameter of 1.65IN, and the adjustable stand accommodates umbrella poles with a diameter of 1.1-1.6 inches, providing a sturdy and reliable base for your favorite umbrellas. 【Easy to install】The umbrella clamp can be quickly mounted on 4x4,6x6 wooden posts or walls.you just need to determine the mounting location and mark the mounting holes,then drill the holes with a drill bit and fix the bracket with screws. 【Package Includes】umbrella Stand Tube x 2, 1-1/4"(32mm) PVC pipe sleeve x 1,Flat head screws x8,umbrella tube Secure the knob x2. The patio umbrella holder clamp not only holds your umbrellas securely, but also adds style to your outdoor decor. Whether you're enjoying a sunny day or hosting a backyard party, our umbrella stand will be the ideal accessory to complete your outdoor setup.