Ultra-Adhering Vacuum Suction Cup Stainless Steel Double Hooks Holder for Bathroom Kitchen Office Rest Room Home Using STRONG HOOK - A single suction Supports weight up to 13 lb maximum and keep it for about 1 year. WET the suction cups before sticking for better results WIDELY APPLICABLE - Adheres to all dry clean smooth surfaces: ceramic tile, glass, mirror, granite, stainless steel, acrylic, laminate and any non-porous surface with glossy finish,above all,any place the surface will not allow any air to runs into the suction cup. KEEP IN MIND: This suction cup will not work on the ceramic tile that the surface are porous,bumpy or matte finished RECYCLE USE - NO Tools, NO Drilling, NO Screws, NO Holes. You can place the suction cup to another suitable place if you change your idea of where to use it EASY INSTALLATION - Innovative rotate and lock suction technology that installs without the use of glue or tools to make holes ADVANCE NOTICE FUNCTION - The red ring on the button gives reminder that the suction cup tends to fall off. Press the button until the red ring invisible to tighten it