About This Item 360 Degree Rotation: The shower head holders can rotate 360 degrees freely. To make it easier to adjust the spray angle, you can tighten or loosen the screw of the bracket according to the weight of your shower. Wide Application: This shower head bracket fits a column 3/4" round riser 22-25mm outer diameter rail. You can adjust the size of the clamp bracket to clamp the shower head holder to the rail flexibly by the knob in the final position. Note: Do not clamp don't over-tighten the knob or tighten it with a wrench. Easy installation: no tools required, no need to disassemble the shower rail, just loosen the knob at the end of the head bracket of the shower then it can be installed on the shower bar. Protective and non-slip design: integrated silicone cushion, to hold the shower head holder in place and protect the shower slide from scratches daily use. Durable Construction: The shower head holder is made of engineered ABS. Coated in an industry-leading chrome finish, designed to resist daily scratches and corrosion.