DIYMAG 40x20mm Super Strong Neodymium Disc Magnet, Permanent Magnet Disc, The World's Strongest and Most Powerful Rare Earth Magnets - One Piece

These were super strong! Unfortunately they were stronger than I thought. When I unpacked the boxes they came in, they jumped at each other and they both shattered! I then read the paper from the box and realized I should have read it first! Be careful

These magnets are super strong - read the safety warning carefully. I unpacked two of them and had one in each hand. They jumped together from at least 4 inches apart and shattered. They released sparks and sent shards flying. Don't under estimate them. You will need tools to pry them apart.

These removed a security tag that was erroneously left on a garment I purchased with absolutely zero effort. I just placed the magnet on top and it popped right off.Be very careful when attaching these together though, they can shatter and you may hurt yourself with the shards. I’m still able to use it but I did receive a refund based on the fact that they broke despite following directions on how to attach them together. Also, keep away from hard drives and computers... I had a similar magnet years ago that bricked my iPod classic.

Holy s*&%! This is powerful!I love magnetics and am always on the lookout for cool magnets and stuff, and this one is POWERFUL! I try to buy the 52N all the time no matter the size because of strength. This is the most affordable I've ever seen for this strength magnet.Buy it!

Very Strong magnet!Be carefull when using this thing with heavy metal objects. If you don't have something covering it, like a piece of cloth or rubber or something, it can pull objects toward it (especially other magnets) with such force that it will actually chip itself from the collision. This thing is super powerful!

It's definitely strong. It sometimes doesn't hold very well against screws in the drywall but you can still tell where they are using this.You REALLY don't want to have this thing grab ahold of something without you intending for it to happen because you could get quite a nasty pinch. It's strong!

I bought a jacket overseas and didn't notice it still had a security tag attached until I got home. This did the trick.

I bought this to get the security tag off a pair of shoes that were shipped with the security tag still on. I tried, it didn't work. I got mad and went to the internet for answers. I was using it on the wrong side of the tag. A little counter intuitive but don't put it on the side that looks metal. Put it on the side of the security tag that looks plastic. There is a locking mechanism in that part of the tag that you need to use the magnet to unlock. Took some fidlding around but once i found the sweet spot it slipped right out. I can see why some people said it did not work for the security tags because I too gave up initially. It works, just have to find the right spot.

This is a very strong magnet, just as advertised. I cut out some plastic discs and secured it with tape around the circumference to help prevent it from getting chipped. It's very fun to experience the forces when sliding it along a thick copper plate or dropping it through a copper pipe.We brought it to the beach and it attracted a nice big ball of black sand very quickly.While it's fun for the kids, it can also be dangerous due to the strength. I wouldn't recommend letting any kids play with this unsupervised.

Great magnet, I got it stuck to another giant magnet that's much bigger, by accident, there un-separable now, unless I use a wooden wedge-lever tool, or something like that. Awesome quality, thank you!! Great magnets! They never got damaged either when they accidentally collided, good quality.

This was advertised as a water meter stopping magnet and it’s not strong enough to stop the meter. It is a very powerful magnet but didn’t do what it was advertised and when I chose to return it found out it was not returnable. It was disappointing and now will use it to secure things on my metal door.

YES!! This is the magnet I was looking for! I purchased 2 of them and at an amazing price, they were actually more expensive about 6 months ago, double almost, so I got two of them! Super strong so use with caution. I use them for holding my tools in place while working but the possibilities of uses are endless! And like I mentioned, used with caution because they are extremely powerful!

POSITIVE: Appear to be of good quality. Well packaged.NEGATIVE: I wish the seller would provide technical details about the product. Like Pull Force, MAgnetic field strenght. Or a website describing the technical details . I am certain this product would sell like hot cake if more details were provided.OVERALL: Excellent magnet very strong. I like the price and quality.