Power magnet, Block 25x25x13 mm.

Strong block magnet, made of neodymium.

Length: 2.54 cm.
Width: 2.54 cm.
Height: 1.27 cm.
Strength: approx. 20 kg.

You have to stay focused when handling a magnet with a strength of 20 kg., so only buy this neodymium magnet if you know how to handle it. Against metal or another magnet it cannot be stopped - not even by a finger or a hand. Be careful. 

Strength is measured in direct pull. You get the most optimal strength when the pull is in the same direction as the magnet's field - i.e. on large surfaces with both parts in a vertical position.

If 2 magnets stick directly against each other, use a wooden wedge or something slanted without sharp edges, as a sharp edge can cause the magnets to splinter. If you are used to handling strong magnets, a table edge can also be used. They have to be pulled/pushed apart.

SPECIFICATIONS:
Strength: approx. 20,000 g.
Material: NdFeB
Magnetism: N40
Gauss: 12600-12900 (1.26-1.29 T)
MGOe: 38-40
Max. temperature: 80°C
Surface: nickel-plated (Ni-Cu-Ni)

Must be handled carefully, as two colliding magnets will smash due to the strong magnetic field and the enormous attractive force. The magnet is only protected by a thin layer of nickel. But this does not mean that the magnet is of poor quality; on the contrary. It just means you get more power out of the little block magnet.