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Dangerous Magnets Ltd is your helpful & reputable source for incredibly strong neodymium magnets THAT NEVER WEAKEN WITH AGE.

I trade with scrupulous honesty.

- Keep from young children! If two or more neodymium magnets are swallowed they can lethally puncture gut tissue.
- The material is brittle so it can chip or break if magnets crash. Eye protection advised.
- Magnets can pinch skin and cut clothing. Larger neodymium magnets can crush fingers.
- For sensitive device, eg e.g. credit cards & pacemakers, keep at a distance where the field is negligible.


Neodymium magnets are about 10 times stronger than traditional magnets.

This is a pack of 4 really powerful neodymium magnets. (Sometimes called "rare earth" magnets.)

Dimensions: 20mm diameter by 5mm thick, with a 4mm countersunk hole, taking #6 self-tapping screws.

Strength Grade: N45. Most neodymium magnets are made in China, where there are many suppliers. I have bought CHEAP N45 magnets from China which were definitely weaker than stated, so I have meticulously selected a supplier who is honest about the grade and quality of these neodymium magnets.

Pull: Directly to each other, or 2.4mm sheet steel, about 8 kg. More when stacked. 18 kg if between 2 steel sheets.
(Resistance to sliding is about 1/3 the direct pull)

Countersinking: Two magnets on the North face; two on the South, so mount either to attract or repel. Ideal for quiet-close doors, one magnet in the top edge of the door, and one off-set under under the top of the jamb. For stronger, use 2 pairs or stack them. Or see my D25x6mm.

Potential Uses
- Latches & closures, eg for cupboards & doors.
- Attaching items firmly to steel surfaces.
- Clamp components while gluing.
- Locating studs
- Industrial fixtures.

For my many other sizes of neodymium magnet, click "Sellers Other Listings" or search “Dangerousmagnets”. For an organised list without duplication, leading to Trademe auctions:
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Shipping options

  • Courier. All Fastway Rural Delivery, incl Auck.$12.00
  • Courier. Nationwide - Non Rural Delivery$6.00
  • Pickup, from the Onehunga end of Hillsborough$0.00
  • Additional item (= or higher courier already paid)$0.00
  • PO Boxes, i.e. DON'T! Courier cannot deliver.$50.00
  • Seller allows pick-ups
  • Seller location: Auckland City, Auckland, NZ

Payment options

  • Other options
    Cash, NZ bank deposit

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