They have a high magnetic field strength and have a high coercivity (which makes them magnetically stable). Although magnets can be wonderful toys and highly educational, these are 'adult' toys, andNOT for children.
eBay
50/100/200 Piece Super Powerful Magnets Strong Disc Magnets for Fridge, DIY, Building, Scientific, Craft, Education
Aliexpress UK
Usually surprise is an issue--they can jump out of your hands and snap together from a surprising distance before you realize what is happening. They are strong enough that they can fly into each other or to a piece of iron or steel with such velocity that they can break and send sharp 'shrapnel' flying about!
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Super Powerful Fridge Magnets Strong Square Magnet Perfect for Refrigerator Garage Kitchen Science Office Whiteboard Locker Use
Aliexpress UK
Neodymium magnets are an alloy of neodymium iron and boron. They have very high energy and are more powerful for their size than any other magnet material. You will find them in many industrial and household products and are ideal for crafting.
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20x4-5mm Powerful Magnets Strong Disc Magnets For Fridge DIY Building, Scientific Craft Education 20x4 Hole 5mm 20*4-5 20x4-5
Aliexpress UK
Usually surprise is an issue--they can jump out of your hands and snap together from a surprising distance before you realize what is happening. They are strong enough that they can fly into each other or to a piece of iron or steel with such velocity that they can break and send sharp 'shrapnel' flying about!
eBay
6x3mm Powerful Magnets Strong Disc Magnets For Fridge, DIY, Building, Scientific, Craft, Education 6*3 6x3
Aliexpress UK
Neodymium bar magnets. Holding strength: up to 18 lbs (≈8 kg) per magnet with direct pull. Upgrade your organisation and DIY projects with thishigh-power neodymium bar magnet set, designed formaximum strength, durability, and versatility.
eBay
10x3 5x3 8x3 3x3 4x3mm Super Powerful Magnets Strong Disc Magnets for Fridge, DIY, Building, Scientific, Craft
Aliexpress UK
Spider Magnet's shop is by far the best place to buy high quality neodymium magnets on eBay. We have over 40 years experience in the industry. Our versatile magnets are incredibly high quality, very strong for their size and precisely machined. Our magnets are more than competitively priced and our customer service and experience are second to none. The magnets in this listing are grade N35. Our magnets are triple coated nickel-copper-nickel for good corrosion resistance and these magnets are magnetised axially giving a north pole on one flat face and a south pole on the opposite face.
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50x20x3mm Powerful Magnets Strong Block Magnets For Fridge, DIY, Building, Scientific, Craft, Education 50x20x3 50*20*3
Aliexpress UK
Designed for both practical and decorative use, these magnet pin-like pieces are crafted from high-quality neodymium, known for its exceptional magnetic strength and durability. With multiple quantities available in one set, you can easily choose the right size for your specific needs.
eBay
50/100/200 Piece 2x1mm Super Powerful Magnets Strong Disc Magnets for Fridge, DIY, Building, Scientific, Craft, Education
Aliexpress UK
Samarium Cobalt. N52 is the highest grade which is currently widely and reliably available. Neodymium N52 - High Grade. Grade: N52. Neodymium Blocks. Neodymium Disks / Rods. Neodymium Cubes. Neodymium Rings.
eBay
20x10x2 Super Powerful Magnets Strong Disc Magnets 20mm x 10mm x 2mm for Fridge, DIY, Building, Scientific, Craft, Education
Aliexpress UK