3M ADHESIVE MOUNTING DISCS INCLUDED: To install your HASKO suction cup hooks on a concave and convex rough surface, you'll need to use the 3M Adhesive Mounting Discs first which we have provided in the box.
CORROSION RESISTANT: Rust proof and corrosion resistant construction prevent rusting. Shower hooks are made of Stainless Steel. Cap and knob are made of hardened plastic, and the suction cup itself is made 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. Our suction cup hooks holds up to 22 lbs.