Usage Tips:1.Adjustable The parasol holder is designed to be adjustable, which allows positioning and is suitable for umbrellas with a diameter of up to 38 mm. It can be easily attached to standard and unusual railings and is therefore suitable for various places such as balconies, gardens, patios and tables ( in square shape). 2.Spacesaving design: with its practical clamping plate, the balcony parasol holder does not require an additional bulky base, saves space and allows unhindered paths. The unique design also prevents damage to the umbrella pole, providing a secure and stable grip. 3.And SturdyMade of galvanised cast iron, this umbrella clip excellent oxidation and rust resistance. It is shockproof and features a sturdy grip, stability and protection from sun or rain. It is built to last and withstand various weather conditions. 4.Easy installation: no tools are required for installation. The parasol holder can be easily adjusted and removed with screws. Assembly takes less than 3 minutes and can be installed on railings. The position can also be changed throughout the day for optimal sun protection and shade.