DURABLE CONSTRUCTION: The shower support bracket is made of engineering grade ABS. Clad in an industry-leading chrome finish, designed to resist daily scratches and corrosions. ADJUSTABLE DIAMETER AND HEIGHT: The shower head holder fits 18-25mm outer diameter round riser bar. You can easily adjust the height of the shower along the shower pole to provide every member of the family with a comfortable showering experience.Note: 21mm is the top, 19mm is the bottom, do not install it upside down. 360 DEGREE ROTATION: The shower head holder can rotate 360 degrees freely. To make it easier to adjust the spray angle, you can tighten or loosen the bracket screw according to the weight of your shower. EASY INSTALLATION: No tools required, no disassembly of the shower bar slider, just enjoy the thoughtful design of this shower slider bracket. The shower holder can hold up to 2 kg of hand shower. Note: Please don't tighten the rotary handwheel too hard, and don't tighten it with a wrench.