PLEASE READ THIS BEFORE YOU BUY - 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 mouting surface must be flat and smooth for any other applications. NO TOOL REQUIRED INSTALLATION - This AmeriLuck Suction Grab Bar is easy to install. (1).Clean the rubber discs and the surface it is to be attached to thoroughly. (2). Press as hard as possible against the wall till the green indicators show up. (3). Press down on the flip-up easy release tabs, you will feel negative pressure. The greater the pressure, the better the suction. (Installation Manual included) SAFE TO USE - The indicators on the side of the suction cup will change from red to green when a safe and secure hold is achieved. Before each use, test the firm hold of the suction device. Ensure that both indicators are GREEN. If the adhesion seems insufficient, release the suction assist bar and reattach again. PERFECTLY FOR ELDERLY/SENIOR/ALL AGES - This could be a sweet gift for elderly/senior parents/grand parents. LIMITED LIFETIME WARRANTY - This AmeriLuck Suction Grab Bar(s) come with a limited lifetime warranty against any manufacturing defects.