Your only safe option for use on most 4? tiles features Telescoping Handle extends to adapt to most any tile configuration Installs without tools or expensive professional installation Tested and approved by health professionals including orthopedic surgeons and occupational therapists High Quality 3.7" Rubber Suction Cups provide a very strong hold. Install and remove anytime just about anywhere: - Bathtub and Showers - Vacations - Hotel Stays - Renters - Rehabilitation - Winter Destinations (perfect for snow birds)