CRW 12 inch Suction Grip Bathtub and Shower Handle Grips Balance Assist Bar 1.For use on a dry, flat surface. Not for use on tile 2.Easy installation; no drilling needed 3.Grip feature provides added comfort 4.Secure handle to help give stability in the bathroom 5.suction grip shower handle allows the user to enter a wet or slippery tub or shower safely and with confidence. It helps prevent dangerous slips and falls and is great for travel. Simply position the suction cup grab bar where you want, mount the handle, and push down on the suction cup levers to install the handle on any clean, smooth, nonporous surface.