Quality: Our suction cup hooks are made of high quality ABS plastic, which is environmentally friendly. The adsorption is stronger, more robust and more waterproof. Aluminum alloy screw head and hard-slip copper material are the secret of longevity and strong lifting of the suction cup hook.^ Heavy-Duty Hook: The suction cup holds up to 6.6lb. Each suction cup measures 2.2 x 3.9. Ideal for hanging towels, bathrobes, bath towels, women's backpacks, coats, holiday decorations, etc.^ Easy to install and remove: no screws, no nails, no holes, no glue, no tools Convenient to install anywhere. Counter-twist the knob counter clockwise and release the vacuum. Just wash the suction cup hook with warm water and air dry the air for reuse.^ Multifunctional Suction Cup Hook: The suction cup hook is suitable for mounting directly on s smooth non-porous surfaces such as glass, mirror, smooth tile. even some rough surfaces like frosted glass.^ Waterproof and Oilproof: Water spray on the towel hook can't affect the hook, the sticky suction cup makes it stick on the bathroom and kitchen firmly. ^