1: SUPER POWERFUL - This fishing magnet features a strong neodymium magnet core, providing exceptional holding power for retrieving ferrous objects. 2: HIGH QUALITY - The magnetic force is concentrated on the bottom surface, while the other three sides are shielded by steel cups, minimizing stray magnetism. Offers magnetic strength equivalent to 10 times the volume of a standard magnet of the same size. Designed for permanent performance and long service life. Manufactured under ISO 9001 Quality Management Systems. 3: BEST COATING - Triple-layer Ni+Cu+Ni plating provides a smooth, shiny, and rust-resistant finish. The coated steel cup protects the magnet from chipping, cracking, and corrosion, enhancing durability. 4: MULTI-USE - Features a countersunk hole and includes an eyebolt for easy attachment. Ideal for magnet fishing, underwater salvage, lifting, hanging, and retrieving iron-containing materials. Great for searching for lost metal items such as screws, hooks, fasteners, and tools in garages, yards, warehouses, or bodies of water. 5: PERMANENT STRENGTH - Made with neodymium, a rare earth element known for producing powerful and permanent magnets. This magnet retains its strength over time and will remain highly effective for years. Specifications: - Shape: Round - Materials: NdFeB magnet, A3 steel, 304 stainless steel - Color: Silver - Maximum Vertical Pull Force: D16mm: 5 kg (10 lbs) D20mm: 9 kg (19 lbs) D25mm: 19 kg (41 lbs) D32mm: 32 kg (70 lbs) D36mm: 41 kg (90 lbs) D42mm: 61 kg (134 lbs)