Neodymium magnet buying guide
Updated: 23 October 2026
You are about to add a pack of neodymium magnets to an amazon.co.uk basket, and the title is doing three jobs at once. It may shout a millimetre size, a grade such as N52, and a holding figure that might mean paper or might mean steel. This neodymium magnet buying guide is the order to read those lines in, before the star row. The [neodymium magnet comparison](/hub/diy-supplies/neodymium-magnet) lists the eleven packs in this batch, with prices from £3.99 to £11.89. What you need is a decision: notes on a steel door, a screwed catch, or one disc with a printed kilogram. The capture is 21 October 2026. This is not a lab test.
You are about to add a pack of neodymium magnets to an amazon.co.uk basket, and the title is doing three jobs at once.
You are about to add a pack of neodymium magnets to an amazon.co.uk basket, and the title is doing three jobs at once. It may shout a millimetre size, a grade such as N52, and a holding figure that might mean paper or might mean steel. This neodymium magnet buying guide is the order to read those lines in, before the star row. The neodymium magnet comparison lists the eleven packs in this batch, with prices from £3.99 to £11.89. What you need is a decision: notes on a steel door, a screwed catch, or one disc with a printed kilogram. The capture is 21 October 2026. This is not a lab test.
Our top picks
| Badge | Product | Listed size | Grade stated | Pull claim | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  FIRST4MAGNETS FIRST4MAGNETS N52, 20 mm x 10 mm | 20 mm x 10 mm | N52 | 14.8 kg, flush mild steel | 6.7 | about £9.99 | View offer |
| Best value |  Wukong Wukong 100 pack, 5 mm x 2 mm | 5 mm x 2 mm | N48 | About 26 g of paper | 8.0 | about £5.94 | View offer |
 walolo walolo 40 pack, 6 mm x 3 mm discs | 6 mm x 3 mm | n/a | n/a | 8.1 | about £3.99 | View offer |
On this page
Start with the job and the millimetres
Name the job before you compare grades. A photo on a fridge, a whiteboard note, a drawer that must stay shut, and a single heavy pull on thick steel are not one product. Everyday discs in this batch are 5 mm by 2 mm, 6 mm by 3 mm, and 10 mm. The wide ones are 30 mm by 3 mm. The single specified disc is 20 mm by 10 mm.
Thickness is the line listings get wrong. Wukong's title says 5 mm by 2 mm, while the dimension and thickness fields say 5 mm. Yizhet's block title says 10 by 10 by 4 mm and a bullet says 10 by 4 mm. Photos make the small discs look larger. If the magnet has to sit in a routed hole, order the millimetres you can measure. Magnet Store's chart, their estimate and not a test of these packs, puts N52 about a quarter above N42 only at the same size.
What N42 and N52 change
N42 and N52 are grades of sintered neodymium. A higher number means a stronger magnet at the same size and shape, not a stronger magnet of any size. FIRST4MAGNETS lists standard N grades to about 80°C, with a footnote of 60°C for N50 and N52. That is their temperature note, not a result for an ungraded multi-pack. Most packs in this set print neither a grade nor a heat limit. Extra strong is not N52.
Wukong prints N48 on the bullet. FIRST4MAGNETS F646-N52-1 prints N52 with a model code. BKSAI puts N52 in a colour field that reads 12pcs N52. A review says each strip is small round magnets, so the letters are not one solid block. One walolo review calls the 6 mm discs N45. That word is not on the specification line. If the title only offers a vague strength word, treat the pack as ungraded.
Pull force, paper claims, and gaps
Pull force on a careful listing is the straight pull off thick, clean mild steel, flush, with no paint and no gap. It is a ceiling, not a safe working load, and it is not the sideways hold. FIRST4MAGNETS prints 14.6 kg vertical and 2.92 kg slide on the F646 page. The amazon.co.uk listing says up to 14.8 kg, flush on mild steel. Both are supplier figures and were not retested here.
Wukong's bullet says about six sheets of A4, about 26 g. That is paper. Grtard's title says 8 kg and does not name the surface. VACUBXBY says over 25 lb and also 20 lb on the plate. Paint and a gap of about a millimetre cut the pull. A pot is stronger in contact and weaker once a gap opens, which is the disc and pot comparison.
A sensible spend, and what to refuse
Entry is £3.99 to £5.99: walolo's forty discs at £3.99, WATELL at £4.99 with a unit count of 50 against a title of 40, Wukong's hundred at £5.94, and MAGABALLNET at £5.99. The middle runs to £9.99, and BKSAI's twelve bars are £11.89. A rule of thumb, not a test: paper on a steel door rarely needs more than about £10. The maker lists the same 20 mm N52 nearer £6.82 including VAT. Do not merge that with the £9.99 amazon.co.uk row.
Refuse a shared review count. Both Yizhet ASINs show 4.3 from 23,178, and the text includes other sizes. Refuse a pack you cannot store around children. OPSS PSA1 covers small high-powered magnets because two or more, swallowed, can cause serious injury or death. NHS pages say go to A&E and do not wait for pain. A not-a-toy line is not a certificate. The Consumer Rights Act 2015 covers goods that do not match the description. A qualifying purchase can earn a commission at no extra cost to you.
Common questions
Do I need N52?
You need N52 only when the listing you are copying already says N52, or when you want the strongest common grade at a size you have already fixed. At the same size, Magnet Store's chart puts N52 about a quarter above N42. That is their estimate, not a test of these amazon.co.uk packs. A larger ungraded disc can still pull harder than a tiny N52. In this batch, only FIRST4MAGNETS F646 prints N52 with a model code and a mild-steel sentence.
Is a bigger disc stronger than a higher grade?
Yes, once the sizes are no longer close. Grade compares magnets of the same shape and size. A 30 mm by 3 mm disc and a 5 mm by 2 mm disc are not that comparison, even if the small one says N48 or N52 and the large one says nothing. Read the millimetres first. Use grade to choose between two packs that actually print a grade and match on size. A title that only says extra strong has not given you either number.
Why do two listings both show 23,178 reviews?
Both Yizhet products in this set, the 50-pack of 10 mm by 2 mm discs and the 20-pack block, show 4.3 from 23,178. The review text matches, and it mentions other sizes. Amazon is showing a shared parent row. Use it as a fact about that parent listing, not as two separate British samples of those two sizes. A higher printed count is not a stronger magnet.
What if the title and the dimension field disagree?
Treat the clash as a reason to prefer a cleaner listing if the size has to be exact, and measure the piece when it arrives. Wukong's title says 2 mm thick and the fields say 5 mm. MAGABALLNET's title says 5 mm by 2 mm and the dimension field says 5 mm by 5 mm by 5 mm. WATELL's title says 40 pieces and the unit count says 50. The Consumer Rights Act 2015 is the route if the goods do not match the description. It does not tell you which conflicting line was true before the parcel arrives.
Are nickel-plated discs outdoor magnets?
No. A nickel or nickel-copper-nickel coating slows rust. It does not make the disc waterproof, child-safe, or rated for a wet shed. These listings do not print an outdoor duty or a salt-spray result. If the magnet will sit in rain, you want a product that states an outdoor finish, and you still keep the working load well under any catalogue pull. Plating is not a grade and it is not a pull figure.
Related pages
Sources
Public UK sources and the amazon.co.uk listings compared on this page. Listings captured 21 October 2026. Updated 23 October 2026.
- OPSS PSA1, small high-powered magnets (retrieved 21 October 2026)
- OPSS guidance on the risk of small high-powered magnets (retrieved 21 October 2026)
- Toys (Safety) Regulations 2011, Great Britain (retrieved 21 October 2026)
- NHS Healthier Together: magnets (retrieved 21 October 2026)
- FIRST4MAGNETS F646-N52, pull and temperature note (retrieved 21 October 2026)
- Magnet Store pull chart (retrieved 21 October 2026)
- Eclipse Magnetics: what is a pot magnet (retrieved 21 October 2026)