• MULTI USE - Unique design with Countersunk Hole and Eyebolt Great for salvaged of vous iron-containing nickel material underwater and Good idea for magnet fishing, lifting, hanging, retrieving applications. Have fun to searching items like eyebolt, screens, hooks, fasteners • 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 • BEST COATING - Ni+ Cu+ Ni Triple Layer Coated. The Best Coating Available, which Provides a Shiny and Rust Resident Coated steel cup provides protection for the magnet and helps to prevent chipping or cracking.