Neodymium Magnet - 12mm x 12mm x 12mm - N42 - Pack of 4

'N42' refers to the grade of the neodymium magnet. The 'N' stands for Neodymium, and the number '42' indicates the energy product, representing the maximum magnetic energy the material can store. Higher numbers generally signify stronger magnets.

A 7.4kg pull force means the magnet can hold up to approximately 7.4 kilograms (about 16.3 pounds) of weight when in direct contact with a thick, flat piece of mild steel. This force can vary depending on the thickness and type of material being attracted.

Neodymium magnets have a strong magnetic field and should be kept at a safe distance from sensitive electronics, credit cards, hard drives, and medical devices like pacemakers. A distance of at least 1-2 feet is often recommended for general electronics.

Neodymium magnets are very brittle and cannot be easily drilled or cut without special equipment and techniques. Attempting to do so may cause them to shatter. It is best to use them as they are or incorporate them into designs where their shape is maintained.

Store magnets separately with a non-magnetic material (like cardboard or plastic) between them, or ensure they are in their original packaging if provided. Store them away from heat and magnetic media. They should not be allowed to snap together forcefully.

While the neodymium material is strong, it can be prone to corrosion (rusting) if not coated. These magnets typically have a protective coating (e.g., nickel plating). For prolonged outdoor use, consider additional protection or use them in applications where corrosion is not a concern.

Ensure the item being held is magnetic or contains a sufficient amount of ferromagnetic material. Check if the magnet's pull force (7.4kg) is adequate for the item's weight and the application's requirements. Also, ensure no other magnetic fields are interfering.

This can happen if magnets snap together forcefully or are dropped. Handle with extreme care, keeping magnets separated during storage and use. Chipped magnets may lose some strength but can often still be used if the structural integrity isn't severely compromised.

Neodymium magnets can lose strength if exposed to temperatures above 80°C (176°F). Ensure the magnet is not used in high-heat environments. Demagnetization can also occur over long periods with improper storage or strong opposing magnetic fields.