About this item • Good Corrosion-resistance. Ni+Cu+Ni 3 Layer good corrosion-resistance coating, used both in fresh water and in marine. Steel shell can avoid the naked magnet from scratching and chipping. • Convenient to Use. The Neodymium Magnet comes with a eye bolt, just attach a rope and begin your magnet fishing and salvage. . • Search Little Item. You can search items like eyebolt, screws, hooks, fasteners and so on in your warehouse garage or yard. • Application. Great for salvaged of various iron-containing nickel material underwater and Good idea for magnet fishing, lifting, hanging, retrieving applications.