HASKO accessories - Powerful Vacuum Suction Cup Hook Holder - Organizer for Towel, Bathrobe and Loofah - Strong Stainless Steel Hooks for Bathroom & Kitchen, Towel Hanger Storage, Chrome (2 Pack)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 package! CORROSION RESISTANT: Rust Proof and corrosion resistant construction prevent rusting. Shower Hooks are made of stainless steel, Cap and knob made up of hardened plastic, and the suction cup itself made up of premium quality rubber. NO TOOLS, NO