Review on Waterproof Neodymium Magnets: 12 Pack Black Epoxy Discs for Heavy Duty Use - Powerful Pull Force, Ideal for Kitchen, Science, Art Craft, Office, Therapy by Steve Brethorst

The magnets were strong enough, however some of them broke when I dropped them. The metal is something very soft, much softer than pot metal. You are very gentle. If you're going to use them to hold paper on the floor of a parrot cage, I don't recommend using them at all. The magnets are made of neodymium and are very durable. They must be handled with care to avoid injury or damage to the magnets. They can break if you drop them, or they will interlock quickly. Strong gravitational forces can cause serious injuries. Neodymium magnets are stronger than other types of magnets. They consist of the rare earth element. Neodymium magnets are the strongest and most powerful magnets in the world, and the surprisingly strong interaction between them may surprise you at first. These special magnets are about a quarter in diameter and about half as thick.