Jiepai Shower Bath Towel Hooks Hanging Towel Holder Wall Towel, Bronze (2 Pack). Stainless Steel CORROSION RESISTANT: Rust Proof and corrosion resistant construction prevent rusting. Shower Hooks are made of stainless steel, Cap and knob made up of ABS plastic, and the suction cup itself made up of premium quality rubber. NO TOOLS, NO DRILLING, NO HOLES: With the suction cup technology, it becomes extremely easy to install suction hooks: simply position on a smooth surface, apply pressure and turn clockwise. ADHESIVE MOUNTING DISCS INCLUDED: To install suction cup hooks on a concave and convex rough surface, you'll need to use the Adhesive Mounting Discs first which we have provided in the package! SCOPE OF APPLICATION:Suction cup holder is suitable for the smooth and no concave convex smooth surface such as glass, stainless steel or mirror, ceramic tile, etc...The other than smooth surface must be used adhesive mounting discs(1 provided), such as wood, emulsioni paint, dumb smooth ceramic tile, obscured glass, etc. STRONG SUCTION ABILITY:This suction cup made by high quality silicone material that strong scalability with good air tightness.2.7-inches large Suction cup can bear 7.5 Pounds maximum.