These compact magnets all provide a maximum pull strength between 1kg (2.20lbs) and 3kg (6.61lbs). Neodymium magnets are the strongest in the world and therefore you will notice that these are generally smaller than the samarium cobalt and ceramic magnets in this section. ceramic magnets are the weakest of the three types in this section and are therefore really good value for money. Here, you will also find countersunk magnets and self-adhesive magnets all with a pull strength between 1kg (2.20lbs) and 3kg (6.61lbs).