Magnets hold by magnetic force, which is the attraction of negative ions to positive ones.
The force of the magnet is measured in newtons – this is the strength of the magnet’s ability to attract to a surface.
This force can be measured and different magnets (depending on material and size), will have different strengths.
When purchasing a magnetic base, the strength of the magnet will be shown in either newtons (N) or kilogram force (KGF) depending on how the manufacturer measured the strength of the magnet.
The higher the number, the stronger the magnetic force.
For most applications, the magnetic force of the base won’t need to be taken into account, but on certain applications a stronger magnetic base may be needed, for example, when using an extended post or arm.
Alternatively, larger magnetic blocks are available to attach to the magnetic base, to increase the magnetic force of the base.