HEAVY DUTY MATERIALS high quality steel, very strong, surface black paint treatment, anti-rust, durable to use. QUICK INSTALLATION two hand knob screws, easy to install without any tools. MORE STABLE two large clamps hold parasol more stable and balanced, will not slip even in strong winds. PERFECTLY APPLICABLE Adjustable from 0.8 to 2.5 inches by turning the rotary screw Suitable for railings of different sizes from 0.8 to 2.
