High QualityThe strong magnetic hook is made of neodymium magnet and high quality A3 steel, the hook is strong and reliable. And the size is very portable Super DurablelThe heavy duty magnetic hook is coated with three layers: Ni-Cu-Ni, so the magnetic hook is shiny and anti-rust, provides protection for the magnet and helps the hook to chip or crack. Magnetism is always strong Wide ApplicationAfter accurate simulation and calculation, this hook has a wide range of applications, magnetic hooks for locker , classrooms, grill, refrigerators, doors,cruise cabinsand any place with steel metal Easy to AssembleThe metal magnetic hook can be used without punching, very simple and convenient NOTE25lbs magnetic hooks tension is based on the direction of tension perpendicular to the contact surface - if used horizontally, reduce by 2/3