Review on Highly Magnetic Neodymium Magnets - 5th Generation by Tim Burns

The neodymium magnets in these hooks are very strong and work as advertised. But READ SELLER'S WARNINGS BEFORE PURCHASING. The 30 pound rating is for vertical pull, meaning the hook is hanging vertically from a horizontal surface. When the hook is attached to a vertical surface, it can support much less weight. Why do you think that is? There are different reasons. First, the hook is pulled down a vertical surface, but its maximum pulling force is perpendicular to the surface. This will detach the hook from the surface. That being said, there are other reasons why hooks don't stick as well as you might think. Magnets are attracted to ferrous materials such as iron. The reason magnets stick to steel surfaces is because of the iron in the steel. After all, steel consists not only of iron, but of several metals. Some types of steel contain much less iron than others, and hooks have a weaker bond with those types of steel. for iron surface. Got it, 1 and 2 star reviewers? There are different types of steel, some of which contain more or less iron. The less iron there is in a particular type of steel in the hood, filing cabinet, or cruise cabin wall, the worse the hooks will hold. But that's not all. Most modern surfaces are either painted or lined with plastic or some other material. Separating the hook magnet from the metal with a layer of lacquer, enamel, plastic or paper between them reduces the holding power. That means whatever gets between the hook and the raw steel, if there's a layer there then the hook magnet won't stick either. The thicker the layer, the less adhesion. and mrs 1 and 2 stars are you still there? Yes, that's not all. If you use one of these hooks on a vertical surface, the coating on the surface may have more or less friction. Some surfaces are very slippery. The hook is more likely to slide on a smooth surface than on a surface with a higher coefficient of friction. Think to the extreme: take some oil or grease and apply it to a metal surface and then attach a hook to it. Now the hook slides down easily and hardly bears any weight. The fact is that the type of surface to which the hook is attached is very important. Clear? It is clear that 1 and 2 star reviewers are almost entirely people who are completely ignorant of these concepts. I am writing this because they wrongly downgraded this product which works as advertised. This is a good product. I would buy it again.