DIYMAG Super Strong Neodymium Fishing Magnets 500 lbs(227 KG) Pulling Force Rare Earth Magnet with Countersunk Hole Eyebolt for Retrieving in River and Magnetic Fishing Diameter 2.36 inch(60 mm)

Data based on scientific measurement Pulling Force: 500 lbs 1. We used a 1.5 cm thick A3 high quality steel as the test floor. 2. After many measurements we have obtained scientific and rigorous measurements by pulling the hook at a uniform speed on professional equipment. Several Important Factors Affecting the Tensile Force of Magnets 1.Only when the thickness of the tested steel reaches a certain level the magnetic flux through its cross section would be the largest and the leakage magnetic field between the magnetic poles is the smallest the tensile energy can reach the ideal value. 2.Only when the force is perpendicular to the contact surface can the tension reach the maximum. When the force is parallel to the contact surface the pulling force can only reach 1/3 maximum. 3.Magnets attract only magnetizable materials such as iron cobalt nickel and their alloys. It can not attract non-ferromagnetic plates such as aluminum copper wo