Rare earth magnets neodymium are the world's strongest magnets. All magnets are not created equal! Applied Magnets offers the highest quality rare earth magnets with consistent performance. Our strong rare earth magnets are designed & manufactured to meet stringent quality standards using the latest technology. Neodymium rare earth magnets (also known as Neo, NdFeB, NIB or super magnets) , a type of rare earth magnets, are the permanent magnets made from neodymium, iron, boron and other minor elements. Rare Earth Magnets 0.5 inch Diameter x 0.5 inch Thick Neodymium NdFeB Cylinder Magnet N42 Nickel-Copper-Nickel triple layer coated for rare earth magnets durability and excellent protection against corrosion Nickel + Copper + Nickel 3-layer coating vs. Epoxy single layer coating Nickel + Copper + Nickel 3-layer coating is much more durable than Epoxy single layer coating over time because Epoxy single layer coating is thin and quicker to wear off, even a scratch can damage the coating easily. Once the coating is damaged, magnet will lose magnetic force gradually. More importantly, magnets with Nickel + Copper + Nickel 3-layer coating have superior cracking and chipping resistance in comparison to magnets with Epoxy single layer coating. Customer beware of the magnets with inferior coating. Magnetized through the Thickness Powerful Neodymium Rare Earth magnets Grade N42, stronger than N40, N38 and N35