The shower head holder is made of toughened chrome plated ABS plastic, to support the shower head securely, no metal to risk of rustSpecial Design: Unique Fits Oval slide bar measurement. Suitable compatible with standard shower head, shower clamps compatible with hand-held shower heads with standard connector.Easy to Install: Free-tool to install, This shower holder is a one minute DIY installtion. Enjoy the flexibility of the showerhead holder and the versatility of the handheld shower head.Fully Adjustable: Press the button to move this shower holder up or down on your rail to fit different height.shower holder is suitable compatible with smooth and no concave convex smooth surfaces such as ceramic tiles, glass, smooth wood, smooth metal surfaces, etc.