Made of the Highest Quality Neodymium Rare Earth Magnets, Using State of the Art Manufacturing Technology Grade N42, with an Extremely Strong Pulling Force Great Item for Nail Polish, Shower Door Magnet, Shower Curtain Magnets, and Magnetic Stud Finder Magnetized Through Thickness, the Surfaces. Nickel-Copper-Nickel Triple Layer Coated for Superior Durability Round magnets, fridge magnets refrigerator magnets, crafts, whiteboards, DIY projects, office magnets, rectangular magnets, Worked well for Come-on Project!