Power magnet, Ring 10x4x10 mm.

Strong magnets with a strengt of more than 3 kgs. The ring magnets have a 4 mm. hole for e.g. a wire or a string.

Diameter: 1 cm.
Height: 1 cm.
Hole size: 0.4 cm.
Strength: approx. 3.1 kg.

Perfect for hanging up things - but also if you have dropped your keys in a grate or narrow shaft and need to pick them up with a strong magnet on a rope.

SPECIFICATIONS:
Strength: approx. 3,100 g.
Material: NdFeB
Magnetisation: N42
Gauss: 12900-13200 (1.29-1.32 T)
MGOe: 40-42
Max. temperature: 80°C
Surface: nickel-plated (Ni-Cu-Ni)

The strength is measured in a direct pull with a thick metal plate of pure metal. If you need to hang something in a indirect pull with magnets, please note that the strengt can be up to 6 times less because of a greater "load" on the magnet opposite the direction of the magnetic field.