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Dangerous Magnets Ltd is your helpful & reputable source for incredibly strong neodymium magnets that never weaken with age.

- Keep from young children! If two or more are swallowed they can be lethal, by attracting across gut tissue and puncturing it.
- The material is brittle so it can chip or break if magnets crash together. Eye protection advised.
- Magnets can pinch skin and cut clothing.
- For sensitive devices (e.g. credit cards, pacemakers, magnetic recording), keep at a distance where the field is negligible.


This is a pack of 12 incredibly powerful, neodymium, cylinder magnets.

Dimensions: 10 mm diameter by 5 mm thick, with 3 mm countersunk mounting hole. (Small hole to maximise pull)
(Use #4 countersunk, bolts of self-tapping screws, available on-line from Steelmasters, etc. If you use a spade bit for mounting, you'll need 1" screws.)

6 are countersunk on the North side, 6 on the South, so they can be set up in pairs either to attract or to repel.

Strength Rating: N45. Many magnets sold in NZ are N35 grade or lower, and are significantly weaker. One trader is even advertising a weaker grade as N45.

They have a pull/push of around 2.6 kg between magnets, and the same direct pull to smooth, flat, 1.4 mm sheet steel.

Potential Uses
- This is a convenient size to thread on a non-steel rod to act like a spring - an effective science demonstration.
- Educational: Mount at the ends of dowels for easy, safe handling.
- Electric motors & generators
- One or more stacked for a homopole motor. (Google it)
- School or University science projects
- Closures for cupboards etc, either face to face, or sliding to each other.

For our many other sizes of magnet, click "Sellers Other Listings" or search “Dangerousmagnets”. For a list without duplications,

Note: I have limited stocks of D10x3 mm with 5 or 3 mm hole, not countersunk. Ask if interested. Please read the questions and answers for this listing.
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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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