--- product_id: 760234970 title: "DIYMAG Strong Rare Earth Magnet, Cube Neodymium Science Magnet 40x40x20mm | N52 Large Industrial High Powerful Block Magnets Disc Thick for Crafts, Fridge Unique" brand: "diymag" price: "34177CFA" currency: XOF in_stock: true reviews_count: 13 url: https://www.desertcart.sn/products/760234970-diymag-strong-rare-earth-magnet-cube-neodymium-science-magnet-40x40x20mm store_origin: SN region: Senegal --- # 40x40x20mm - Compact yet powerful block size 80°C Max Temp - Durable under industrial conditions N52 Grade - World's strongest rare earth magnet DIYMAG Strong Rare Earth Magnet, Cube Neodymium Science Magnet 40x40x20mm | N52 Large Industrial High Powerful Block Magnets Disc Thick for Crafts, Fridge Unique **Brand:** diymag **Price:** 34177CFA **Availability:** ✅ In Stock ## Summary > 🧲 Harness the power of the strongest magnet and never settle for less! ## Quick Answers - **What is this?** DIYMAG Strong Rare Earth Magnet, Cube Neodymium Science Magnet 40x40x20mm | N52 Large Industrial High Powerful Block Magnets Disc Thick for Crafts, Fridge Unique by diymag - **How much does it cost?** 34177CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/760234970-diymag-strong-rare-earth-magnet-cube-neodymium-science-magnet-40x40x20mm) ## Best For - diymag enthusiasts ## Why This Product - Trusted diymag brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First Handling:** Designed with caution in mind—wear gloves and glasses to handle this powerhouse safely. - • **Unmatched Magnetic Power:** Experience the force of the strongest N52 neodymium magnet on the market. - • **Heat Resistant Performance:** Operates reliably up to 80°C, ideal for demanding environments. - • **Versatile Industrial & DIY Use:** Perfect for lifting, crafting, and executive desk toys that spark conversation. - • **Precision Engineered Dimensions:** Compact 40x40x20mm size fits perfectly for industrial and creative projects. ## Overview This 40x40x20mm N52 neodymium block magnet from DIYMAG is the ultimate rare earth magnet, delivering unmatched magnetic strength in a compact form. Rated for industrial use with a max operating temperature of 80°C, it’s perfect for lifting, crafting, and executive toys. With over 4,600 positive reviews, it’s the go-to choice for professionals and hobbyists who demand power and precision. ## Description At DIYMAG you not only find the world's strongest magnets, you also have a large selection. ## Features - 100% Brand New By DIYMAG. Magnetized through thickness, poles on the flat surfaces. - Super strong and powerful magnet, much stronger than ceramic magnets! - Dimension: Length 40mm x width 40mm x thickness 20mm Max Operating Temperature: 80°C/176°F. - Quantity: 1 Block Industrial Lifting Rare Earth Magnets N52 per Package. - Neodymium magnets are brittle; they can be broken or can splinter in a collision. One should wear gloves and protective glasses when handling these magnets, because splinters could disengage and fly from the magnets.You should avoid having constant contact with magnets of any size and keep a distance of at least 3 feet to large magnets. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07CCJSPWR | | Best Sellers Rank | #9,297 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #96 in Rare Earth Magnets | | Brand Name | DIYMAG | | Color | Silver | | Customer Reviews | 4.5 4.5 out of 5 stars (4,640) 4.5 out of 5 stars | | Included Components | Material Handling; Pulling & Lifting Equipment; industrial-rare-earth-magnets | | Item Dimensions L X W X Thickness | 1.57"L x 1.57"W x 0.79"Th | | Item Thickness | 3.54 Inches | | Manufacturer | DIYMAG | | Material Type | Ceramic | | Model Number | F404020 | | Number Of Pieces | 1 | | Part Number | F404020 | | Shape | Rectangular | | Unit Count | 1 Count | | Upc | 850077560378 | ## Product Details - **Brand:** DIYMAG - **Color:** Silver - **Material:** Ceramic - **Product Dimensions:** 1.57"L x 1.57"W x 0.79"Th - **Shape:** Rectangular ## Images ![DIYMAG Strong Rare Earth Magnet, Cube Neodymium Science Magnet 40x40x20mm | N52 Large Industrial High Powerful Block Magnets Disc Thick for Crafts, Fridge Unique - Image 1](https://m.media-amazon.com/images/I/61NuT6RrCSL.jpg) ## Available Options This product comes in different **Size, Number of Items** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Powerfull. Know WHAT You Are Going To Use Them For. NOT A Kids Toy! *by on Reviewed in the United States April 25, 2024* This is an interesting review because the number of stars for easy to remove and durability are both one. Normally, a one-star review is bad. But in this case, less starts is good news! Easy to remove would mean a weak magnet, and neodymium magnets are not durable. These are facts. The product advertisement on Amazon covers some of these points. But the question should have been "magnetic grip" and that would have been five stars. Complaining about a neodymium magnet being fragile is like saying an eggshell is fragile. It is the way it is.So, first off, you want powerful magnets? Order these. Good price, fast shipping, good product. You will get what you want. But there is more to the story.These are dangerous in even in experienced hands. I am experienced - and still had troubles. This is not the manufacturers or vendors fault. These are powerful magnets, and any difficulties are the responsibility of the user.Don't order these as toys. To avoid disappointment, you should know in advance exactly what you wish to do with these. I did know, and I had difficulties, because these magnets are so strong they are actually annoying!!I did not want multiple powerful magnets because of the need to avoid crashing magnets together which breaks them, creating sharp shards of metal, crushing fingers in the process. I knew I wanted a single magnet, to demonstrate the long distance effects of a powerful magnet.Other websites had what are probably better magnets at a similar price, but nobody could beat Amazon's shipping costs and time. So I bought four of these. They are shipped two to a small box, together, with a small spacer between them. I knew already I wanted these magnets stuck together into one big one. I knew I wanted to put them into a larger piece of metal to make handling easier and safer.When you order two, they come packed in the same box, separated by a piece of plastic and cushioned in styrofoam. Getting a magnet pair separated was difficult, but doable. I knew that bringing two pairs together in a controlled manner would be very difficult. Knowing that these magnets will accelerate towards each other in an instant, I put one pair outside the cardboard they shipped in, placed a magazine inside the box for extra spacing and cushioning, and brought them together. As expected, they flew together. But I could not move them enough to get the magazine out or slide them to the edge of the cardboard. The attractive force was so great the cardboard was compressed to nothing. I ended up cutting around the magnet outline, through the cardboard and the magazine.I decided to put the magnets into a vice, gripping the two lower magnets only. It took 20 minutes to get them properly oriented in the vice. Sliding and twisting the magnets required the use of a crowbar and vice grips. Using the bench vice and large water pump pliers, I was able to get enough separation to slide a wooden shim between them. Using the shim, I was able to get all the paper out between the magnet pairs, then slide the shim out, thus bringing the magnets together in a controlled fashion. This took another hour!I brought the four magnets into the house to tinker. From 18 inches away, a 3" diameter ceramic magnet, with a couple small disc magnets attached, slammed into my new big magnet. All three ceramic magnets broke and chipped my new big magnet. I was pretty confident 18" was enough separation.There is a very nice set of smart phone apps written by Keuwlsoft. Go to the play store, search for Keuwlsoft, scroll down and look for the "Gauss Meter." It is free, but you get ads. They are not bad, but I always buy the apps because I want to reward the creative minds that create these tools. The app turns the magnetometer inside your smartphone into a Gauss meter, allowing you to measure and quantify the intensity of magnetic fields. This Gauss meter picks up my new big magnet from a few feet away. Bringing the phone closer, hits the 45 gauss limit of the meter. It affects compasses and other magnets at a similar distance, which is exactly what I want to demonstrate to my students. 45 Gauss is a lot! The earths magnetic field average 1/2 a Gauss.Since I do not want to ever separate these magnets, I decided to put them into a protective metal sleeve. I used a 3" long piece of 2" x 2" x 1/8th" piece of square tubing. It was my intention to center the magnets in the tube by driving wooden wedges into place. The magnets had other ideas, and simply getting them into the tube required a hydraulic press. Driving a wedge between the magnet and the wall of the tubing was not possible, so I settled for putting wedges down the two remaining sides. See the photo.This magnet will serve my classroom demonstrations very nicely. The price is reasonable, shipping was free with Prime, and the two-day shipping time was fantastic. I urge you to pursue reading on magnet safety. Have fun, enjoy these, and be safe!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++..........................................................................................................................................................................+.3 ### ⭐⭐⭐⭐⭐ NOT A TOY! Super dang strong! *by on Reviewed in the United States May 16, 2026* "Super Strong" hardly begins to describe how strong these are! I lost a pair of strong 1", black neodymium magnets I purchased half a dozen years ago - these are at least several times stronger.Please don't buy these for a youngster's toy - read some of the negative reviews first. These are so strong they can be quite dangerous. I'm a grown man, and though the two magnets arrived with a thin plastic washer between them, I could barely get the washer out. There are two ways to separate the two cubes; put one on a tabletop and push/slide the other one down. Alternately, I put one in a padded jaw vise and leveraged the other sideways and off with a padded jaw adjustable wrench.These will not be used to confirm drywall screw location under tile etc. ### ⭐⭐⭐⭐⭐ Insanely Strong - Beware Of Injury Risk *by on Reviewed in the United States May 22, 2026* These magnets are every bit as strong as they are advertised, almost too strong for any practical application. The vendor mentions that they can be separated by sliding them. This is true, but they have to be separated by mechanical process. They had a plastic separator between them when they were shipped, and I could not get them separated without using an old breadboard which is the same width as one magnet and sliding them apart. Be VERY careful when separating, because the risk of them joining again and pinching you is high. I've worked with Neodymium magnets making brushless motors, speaker drivers, etc., so I have a lot of experience handling them. I ended up carefully combining the four magnets I had using a wedge, because separately, they were too much of a menace if they got anywhere near each other. I also wrapped them in vinyl tape so they wouldn't chip or break, plus that was the safest way to experiment with them. The four magnet set is stored in a PVC pipe with end caps since PVC is can't be crushed easily. ## Frequently Bought Together - 40x40x20mm Super Strong Neodymium Block Magnet, N52 Permanent Magnet Disc, The World's Strongest and Most Powerful Rare Earth Magnets - One Piece - LOVIMAG Super Strong Neodymium Disc Magnets, Powerful Rare Earth Magnet with Double-Sided Adhesive for Fridge, DIY, Building, Scientific, Craft, and Office Magnetic - 1.26 inch x 1/8 inch, Pack of 12 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/760234970-diymag-strong-rare-earth-magnet-cube-neodymium-science-magnet-40x40x20mm](https://www.desertcart.sn/products/760234970-diymag-strong-rare-earth-magnet-cube-neodymium-science-magnet-40x40x20mm) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-07-28*