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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12x3-4mm Super Strong Neodymium Magnet N35 NdfeB Permanent Magnetic imanes Round With Holes Powerful Magnets Refrigerator Magnet
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
4x2mm Super Strong Magnet N35 Round Magnetic NdFeB Neodymium Magnet Powerful Disc imanes Refrigerator Magnets
Aliexpress UK
N numbers range from N27 - N52. Very Small but Strong Mini Neodymium Magnets. Neodymium is about as common as tin or lead. Neodymium Magnets. Disc & Cube. Never allow magnets to jump together or to jump to steel as they will likely shatter.
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20x10x2mm Super Strong Magnet N35 Block Magnetic NdFeB Neodymium Magnet Powerful Disc imanes Refrigerator Magnets
Aliexpress UK
High-quality N52 grade Neodymium magnets in disc shape, with nickel coating. Sold in bundles of 1 to 25 units. Suitable for DIY crafts and various small projects. Manufactured in China these silver-coloured magnets are known for their strength and durability.
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15x3mm Super Strong Neodymium Magnet N35 NdfeB Permanent Magnetic imanes Round Powerful Magnets Refrigerator Magnet
Aliexpress UK
SUPER STRONG N52 MAGNETS: Rare earth high graded N52 neodymium magnets have a high resistance to demagnetization, will not lose their magnetization around other magnets or if dropped. Neodymium magnets are currently the strongest type of permanent magnet.
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20x10x5mm Super Powerful Magnet Neodymium Magnets Imanes Magnetic Block NdfeB Strong Refrigerator Magnets for Fridge DIY Craft
Aliexpress UK
Samarium Cobalt. Grade: N45. Neodymium Blocks. Neodymium Disks / Rods. Neodymium Cubes. Neodymium Rings. Neodymium Spheres. Neodymium - Self Adhesive.
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3x10mm Mini Small Round Magnets 3*10 Powerful Magnets Strong Disc Magnet For Fridge, DIY, Scientific, Craft, 3*10mm 3*10 3x10
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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8/10/12/15/18/20x3 Strong Magnet Countersunk Round NdFeB Neodymium Magnet Powerful Rare Earth Permanent Fridge Magnets with hole
Aliexpress UK
Magnets for crafts and hobbies. 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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Super Powerful Round Magnet Neodymium Magnet NdfeB N35 Strong Permanent Magnetic imanes Refrigerator Magnet 4x1.5/5x1/6x2/6x3
Aliexpress UK