ATTENTION: Only Fit for any NON-POROUS & SMOOTH surface . CANNOT maintain on porous or rough surfaces: Marble, Fiberglass, Paint wall, Porcelain , Nano Tiles , Plaster and wood , or across grout lines. . Durable & Ideal Hooks- Multipurpose hooks constructed of type 304 premium grade stainless steel , build to resist daily scratches , corrosions and tarnishing . And it's waterproof and can be used in wet areas . Can hang almost anything : towels , loofahs , bath robes , squeegees , kitchen tools , etc . . Heavy Duty Quality - Each suction cup hook can hold up to 20lbs with correct installation . Perfect for using in bathroom , kitchen , living room , bedroom , closets , etc . Work on any smooth & non-porous surfaces such as glass , metal , ceramic tile , plastic , etc . . Unique Twist & Fix Technology Without Damage - No more ugly holes in your shower or bathroom Simply choose a smooth surface , twist the knob , and you're done in no time removable and repositionable , and won't leave any marks or sticky residue .