Applicable Surface: Please pay attention that the bathroom grab rails ONLY stick on smooth, dense, and well-sealed hard walls, such as metal, glass, tiles, marble, porcelain, fiberglass, and stainless steel or other non-porous surfaces. They are not suitable for rough tiles, unfinished marble, wallpaper, drywall, wooden surfaces, mosaic tiles, or any porous or breathable wall surfaces. Please do not put your full weight on suction cup shower grab bars Easy to Install: The suction handles for the shower are equipped with 2 strong suction cups with locking latches to provide stable protection. The bath handles for the elderly ONLY need to pull down the latches within 5 seconds, and the installation is done quickly and effortlessly! NO drilling, NO screws, NO glue and NO tools are required, fully removable, reusable and causing no damage to your wall Installation Instructions: First wipe the wall clean to keep the wall smooth and dry, make the suction cup handrail buckle latch open, press the suction cup handle firmly and vertically on the wall, then press the buckle firmly to ensure that the suction cup is tightly attached to the wall, and finally make sure that the suction grab rail is completely firmly adsorbed to the wall. If it does not adhere firmly, repeat the above steps Portable Bath Handle: Portable shower safety handle with suction cup fitting and rapid release! The suction grab bars are easy to install, tool-free/no drilling. The grab bar will not harm surfaces when installed and used properly. Portable and removable design can also be applied to hotels when traveling Notes: For getting sufficient suction power to work, 1) ✔ This Suction Grab Bar only works on tile size LARGER THAN 4"x4", 2) ✔ The suction discs can not be mounted on grout seam(s). 3)✔ Make sure there's no texture on the shower wall. 4)✔ The mounting surface must be flat and smooth for any other applications, Weight: 0.7495716908 pounds, Manufacturer: Newthinking