Please review this checklist to help you handle these magnets properly and avoid potentially serious personal injuries, as well as damage to the magnets themselves.

Neodymium magnets will leap and slam together from several inches to several feet apart. If you have a finger in the way, it can get severely pinched or even broken. We strongly recommend sliding magnets apart rather than trying to pull them off the stack. 

Neodymium magnets are not toys. Do not allow children to handle or play with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attach to each other through intestinal walls causing serious injuries and even death.

Neodymium magnets create strong magnetic fields around them, which can interfere with pacemakers, ICDs and other implanted medical devices. This is because many of these devices are made with a feature that deactivates the device in a magnetic field.

The strong magnetic fields emanating from neodymium magnets can damage magnetic media such as credit cards, magnetic ID cards, cassette tapes, video tapes or other such devices. They can also damage older televisions, VCRs, computer monitors and CRT displays.

Magnetic fields interfere with compasses or magnetometers used in navigation for air and sea transport, as well as the internal compasses of smartphone and GPS devices.

Studies show a small percentage of people suffer from an allergy to some metals including nickel. The allergic reaction is often manifested in redness and a skin rash. If you have a nickel allergy, try wearing gloves or avoid directly handling nickel-plated neodymium magnets.

While magnets have been proven to retain their effectiveness up to 80°C or 176°F, this temperature may vary depending on the grade, shape and application of the particular magnet. 

Avoid drilling or machining neodymium magnets. When ground into a dust or powder, this material is highly flammable.