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

For my 45+ other neodymium magnet sizes, click "Sellers Other Listings" or search “Dangerousmagnet”.
For a list without duplication, taking you to Trademe auctions:

I am a scrupulously honest trader.

- The material is brittle and will chip or break if magnets crash together; eye protection advised.
- Neodymium magnets can pinch skin, cut clothing, even crush fingers.
- For sensitive devices, e.g. credit cards & pacemakers, keep at a distance where the field is negligible.
- This neodymium magnet is NOT A TOY!


A single, massively powerful, neodymium magnet, also known as a "rare earth" magnet.
This type is about 10x more powerful than traditional ferrite magnets.

Size: 50mm x 25mm x 12mm, with 5mm countersunk mounting hole.

Poles on the large faces.

Strength Rating: N45. China has many large suppliers I have bought CHEAP N45 neodymium magnets from China which were definitely weaker than stated, so I have selected a supplier who is honest about the grade and quality of these neodymium magnets.

Pull: To 4.6mm steel plate: Approx 35 kg! They are difficult and dangerous to handle unless attached to something you can grasp well. Between 2 such plates, pull is around 60 kg!

Ideal for attaching items to a solid steel surface when quick removal is required (eg equipment box in a van, a tractor, steel girders, or shipping container.

Suitable for making "sweeper" magnets,i.e. magnet "brooms". Attach a row, countersink outermost, along one side of a thick (5mm or more), flat, steel bar, say 1 to 2 cm apart in order to project the field further from the magnets. Put the assembly inside a non-magnetic housing, say plastic down-pipe or S/S channeling.

Other uses:
- A catch for a heavy gate. (Protect against weather)
- Making wind generators, eg "Hugh Piggott's Wind Generator"
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Farming checklist
  1. Broadband for rural NZ is here. Find out more
  2. Get rural insurance from a specialised rural insurer

Shipping options

  • Courier. RURAL DELIVERY, outside Auckland$14.00
  • Courier. RURAL DELIVERY - Auckland$11.00
  • Courier (Non RD) Outside Auckland$9.00
  • Courier (Non RD) Auckland$6.00
  • Additional item (= or higher courier already paid)$0.00
  • Pickup, from the Onehunga end of Hillsborough$0.00
  • Seller allows pick-ups
  • Seller location: Auckland City, Auckland, NZ

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  • Other options
    Cash, NZ bank deposit

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