• PERMANENT STRENGTH - Neodymium is a kind of rare earth metal, it's suitable for making permanent & powerful magnets. This fishing magnet has permanent magnetism; it will be the same powerful even decades after. • Available in all size • Material : Neodymium+304 stainless steel. Model Number : Neodymium Magnet. Super Strong Neodymium Fishing Magnets Heavy Duty Rare Earth Magnet with