Since neodymium is the strongest magnet material, a magnet system with a neodymium magnet inside makes it the strongest holding magnet. The downside to neodymium is that it is sensitive to moisture. This means that it is not optimal for permanent outdoor use. Of course it will last a while, but not permanent.
We distribute our neodymium holding magnets in many different sizes, strengths and with your desired mounting option.
The stated forces have been determined at room temperature on a plate in polished steel (S235JR according to DIN 10 025) with a thickness of 10 mm (1kg ~ 10N). A maximum deviation of -10% compared to the specified value is possible in exceptional cases. Value is exceeded in general. Depending on the type of application (installation situation, temperatures, counter anchor etc.) the forces can be influenced enormously. The indicated values are serving as an orientation.