SIZE:E32mm BEARABLE TRACTION 25 lbs tension of magnetic hook is based on the direction of tension perpendicular to the contact surface -- reduced by 2/3 if used horizontally. Please note that the tension of the magnetic hook is also affected by the direction, the material of the contact surface and other factors. SUPERIOR MAGNETS COATED Black magnetic hooks heavy duty are coated with three layers of epoxy+ Nickel+ Copper, which provides a shiny and rust resistant coated steel cup provides protection for the magnet and helps to prevent chipping or cracking. HIGH QUALITY The magnetic hook is composed of neodymium magnet and high quality A3 steel. Due to the addition of an iron shell, the suction of strong magnetic hook is several times that of an ordinary magnet. Heavy metal magnetic hook, strong magnetism forever VARIOUS USES Strong magnetic hook is easy to install and use because of its simple structure. Metal magnetic hook is an ideal choice for hanging small objects in places with iron or steel, such as home, school, workshop, indoor and outdoor.