The magnets must be kept away from any carrier of magnetic information, as for example credit cards, magnet bands, floppy disks, and all electronic equipment such as hearing aids, pacemakers, measuring- and control instruments and EDB machines. These items can be damaged by the extreme, high power magnet fields.
Never use magnets in explosive settings, because sparks can be ignited.
Before use, always wet the magnets to prevent spontaneous ignition. Always use cooling water, never work without it by processing of the magnets!
Always keep dust and processed parts after processing in water containing reservoirs or hermetically closed spaces in order to control the risk for spontaneous ignition.