These Neodymium pot magnets feature an metric internal thread that allow them to be screwed together with objects that have a compatible external thread.
Nickel-plated Ndfeb magnets are made from an alloy of neodymium, iron & boron and are plated with a triple layer of: Ni-Cu-Ni (Nickel-Copper-Nickel) using an electrolytic based process for maximum protection against corrosion & oxidation.
NdFeB Pot Magnets are best for small sized magnetic products with maximum pull strength (ideally when in direct contact with ferromagnetic e.g. mild steel surfaces).
The steel housing provides a safe place for the magnets embedded in it. Most pot magnets can be heated to temperatures up to 80°C without losing their magnetization.