Suction Cup and Adhesive Hook for Shower and Walls Surface compatibility Suction cup hooks work on Glass, Mirrors, Glossy porcelain tiles, Acrylic/Plastic shower inserts, Smooth stainless steel, Quartz, Laminate, and other smooth nonporous surfaces. Not suitable for painted or textured surfaces. Backing and hold This adhesive towel hook uses a combination of selfadhesive glue and suction for a strong grip on walls. It offers longlasting adhesion and is suitable for hanging keys, coats, hats, bags, and various other items. Not for painted or textured surfaces. How to install and use Easy to use: clean and dry the wall, press the suction cup hook on the smooth surface, then rotate it clockwise to twist the handle and suck out the air. It will firmly adhere to the surface. Please wait 72 hours before hanging items. Tool installation and material No tools or drilling required. Twist & Lock for a quick, hassle setup. Made of BPA plastic and will never rust. Practical use scenarios In the shower: hang towels, washcloths, or bath accessories on the suction cup hooks. In the entryway or near the door: hang keys, hats, coats, and bags with the adhesive hooks. In the kitchen or bathroom: use on smooth walls to organize lightweight items and reduce clutter.