RHINOCATS 400Pcs Small Magnets, 4 Different Sizes Tiny Mini Magents, Multi-Use for Fridge, DIY, Office, Hobbies, Crafts and Science

If you've ever found yourself staring at a magnet and asking the universe how it works, this 400-count mixed pack from RHINOCATS won't answer that question philosophically — but it will give you more tiny magnets than you'll ever need to test the phenomenon personally. Four sizes (6x2mm, 5x2mm, 4x2mm, and 3x2mm), 100 of each, all strong for their size and consistent in quality. The nickel coating keeps them looking clean and rust-free, and the variety means you're not locked into one dimension for every project — great for 3D printing closures, craft work, DIY builds, or anywhere you need a small but reliable hold. The magnet strength genuinely surprises for how small these are. They're not going to move mountains, but for embedding in printed parts, securing lightweight panels, or any application where you need a discreet, low-profile hold, they perform well above their weight class. Now, do they hold more things than the entire Faygo lineup? Absolutely. Can they help you understand the miracles of the universe? Unclear. But for roughly three cents a magnet you're getting a versatile, well-made bulk pack that will cover your needs across more projects than you've probably planned for yet. Magnets. Miracles. Whatever. Five stars.

These are fantastic for everything from fridge organization and office tasks to DIY crafts, hobbies, and science experiments. It’s no wonder they are marked as "Amazon's Choice" with over 5K bought in the past month the value for money here is incredible. If you need strong, small, and reliable magnets for your 3D printing projects or miniature crafting, this mixed 400-pack is an absolute must-have!

These magnets worked perfectly for what I needed! I attached them to little clay figures I made and they hold really well. The magnets are actually so strong that they can be a little hard to pull apart or remove, but that’s definitely a good problem to have! I wanted something that would stay securely in place and these absolutely do. Great quality and perfect for crafts!

Great option with multiple choices to choose from! Easy to add to items, super strong magnets! Love the size options! Fits great!

I picked up this massive 400-piece RHINOCATS Small Magnet Assortment to serve as my primary hardware supply vault for interlocking hobby prints, miniature models, and modular terrain tiles. When you are engineering custom multi-part models, a single magnet size simply cannot fit every application. This 4-size variety kit is an exceptional resource, providing everything from tiny micro-discs up to wider, heavy-duty closure magnets perfectly sorted in a single case. Why this 400-piece assortment is a total win for hobbyists: Perfect Progressive Sizing Range: Having four distinct sizes allows you to choose the exact amount of holding power needed for each component. The tiniest micro-magnets are an absolute lifesaver for embedding into swappable weapon arms on gaming miniatures, while the larger discs are perfect for locking down heavy storage box lids and tool racks. Impeccable Sizing Uniformity: I checked multiple discs from each size category using digital calipers, and they are highly uniform and true to spec. In additive manufacturing and CAD design, precise manufacturing control is a mandatory requirement—a variance of even 0.1mm can mean the difference between a clean mechanical press-fit or a cracked plastic layer line. Flawless Triple-Layer Plating: The silver nickel-copper-nickel coating is smooth, shiny, and entirely free of surface pitting, edge burrs, or flaking. This pristine surface quality guarantees a 100% flat contact face between mating parts, allowing your assemblies to close completely tight with zero gap. Makerspace Design & Installation Tips: Model Sockets with Tiny Clearances: When modeling the receiving sockets for these discs in your CAD software, set your hole parameters roughly 0.1mm to 0.15mm larger than the magnet's physical size. This provides just enough clearance to press the magnet home completely flat using the flat face of a pair of pliers without splitting your printed plastic walls. Thermal Safety Rule: If you are using adhesives to secure them in looser pockets, stick to thick Cyanoacrylate (Super Glue) or a quick-cure 2-part epoxy. Avoid using a hot glue gun anywhere near neodymium magnets, as exposing rare-earth alloys to extreme heat will instantly and permanently ruin their internal magnetic alignment fields. Mark Your Polarities Early: Before permanently embedding or gluing matching pairs into your assemblies, mark one side of your magnet stack with a permanent marker. This guarantees you don't accidentally seat a disc backward and end up with project panels that actively repel each other. The big takeaway: This RHINOCATS kit delivers a spectacular balance of physical geometry choices, reliable manufacturing tolerances, and rugged holding strength. The plastic storage case keeps the sizes perfectly separated, ensuring the different stacks don't violently snap together and chip in your tool drawer. It is an exceptional value purchase that completely handles your small-parts organizing needs.

Extremely strong magnics, love the different sizes

Im using these in toys and functional parts for my 3D prints and boy howdy do they satisfy my need for magnets. They're more than strong enough for my needs. If you need stronger magnets, get ready to pay big time for it...

Good Strong Magnets, Perfect for 3D Prints. I've made a few things with these, one being the hangman game in book form. These work great. Good tip on installing it to keep them in a stack. Add your glue to the hole, press in the magnet, and pull sideways to release. Makes for a super fast install. When installing the opposite side, go back to the original magnet, flip the stack over, and make sure you feel it repelling rather than connecting. This way, when you install them, they are installed correctly, with the repellent side down, in the glue.

Fantastic magnets, small enough and strong enough for my DIY and CRAFT needs.