1.HEAVY UMBRELLA STAND The metal components of the umbrella stand are made of durable metal, including thumb screws. There is a drainage outlet at the bottom of the umbrella frame, so you don't have to worry about it corroding and rusting by rain. 2.SPACE SAVING Umbrella stands save more space on decks, patios, gardens and other outdoor areas and eliminate heavy and annoying umbrella stands on decks or patios. The umbrella clip can be quickly mounted on the railing and the position changed. 3.Easy to install: the umbrella frame can be quickly and conveniently attached to the balcony railing without drilling. You only need to connect the umbrella carrier to railings, tables, patios, stands etc. that are less than 2 inches thick, and tighten the screws to secure it. Then place the parasol in a 1.5 inch metal tube and tighten the screws to complete the installation. 4.Umbrella frame size: umbrella frame length: 16 cm/6.3 inches, inner diameter of the metal tube: 3.8 cm/1.5 inches; the adjustment range of the holder is 05 cm/02 inches. The patio umbrella stand is equipped with 2 thumb screws, which can firmly fix the umbrella and adjust its height.