High quality material: They are made of high quality stainless steel + PVC. This gives them resistance to corrosion and rust. Non-toxic, odorless and environmentally friendly. You can easily clean the strong suction hook and use it again Easy installation: the suction hooks are made of plastic as well as the rubberized vacuum disc. Also, the fix in seconds. Plus, it won’t leave any unsightly glue marks if you want to remove it. Conditions: Use glass, tile, and other smooth surfaces to keep things NEAT. Contact surface must be clean and dry. Wide application: both in the bathroom, bedroom, as well as in the kitchen, you can open the hook with sucker.Press tightly on the contact surface