SUPER POWERFUL - This fishing magnets is 2.36 inch(60 mm) in diameter, adopt strong neodymium magnet for its base. It can offer 400 lbs(181 KG) pulling strength under ideal condition. HIGH QUALITY - The powerful magnetic force is only concentrated at the bottom, The other three sides are Protected by steel cups that almost no magnetic force and magnetic force equivalent to 10 times the volume of the same magnet. force permanent, long service life. Made under ISO 9001 Quality Systems. 60 Days Money Back Guaranteed! BEST COATING - Ni+Cu+Ni Triple Layer Coated. The Best Coating Available, which Provides a Shiny and Rust Resistant Coated steel cup provides protection for the magnet and helps to prevent chipping or cracking. MULTI USE - Unique design with Countersunk Hole and Eyebolt Great for salvaged of various iron-containning nickel material underwater and Good idea for magnet fishing, lifting, hanging, retrieving applications. Have fun to searching items like eyebolt, screws, hooks, fasteners and so on in your warehouse garage or yard. 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.