and Durability: Our suction cups stay unrivaled! Made of plastic, these hooks never rust, and yet they hold a weight of up to 15 lbs! No Tools. No Screws. Hassle-Free Installation: No more ugly holes in your walls! Simply choose a smooth , Twist & Lock, and you're done in no time! The hangers are removable and repositionable, and 't leave any marks or sticky residue! Simple Installation Steps: 1, Choose and Clean any smooth and non-porous . 2, Fully loosen the hook counter-clockwise. 3, the base against your , and twist the hook clockwise until fully tight. Functionality Meets Style: Our Superior Vacuum Suction Technology lets you install these hooks with ease, while enhancing the beauty of your bathroom. Once installed, their sleek and clean appearance make you wonder if they're really suction cups! Caution: The suction cup only works on Glass, Mirrors, Glossy porcelain tiles, Acrylic/Plastic shower snserts, Smooth stainless steel, Quartz, Laminate, and other smooth and non-porous surfaces.