The towel rack is aluminum, and the magnets are covered with rubber, will not rust, can last for years Also will not scratch the surface of appliance This powerful removable bath towel is perfect for hanging towel, washcloths, cleaning rag Suitable for any metal appliance like refrigerator, stove, oven, sink, dishwasher, washing machine, But can not work on stainless steel appliance because they are not The magnets are very strong Once stick on the metal surface, the towel holder will not anymore you want to reposition the holder, just pull the towel holder from the metal surface with effort, and stick again The towel holder make life more and organized