FINDMAG 40 x 40 x 20mm Neodymium Magnet Strong, Strong Rare Earth Magnet | Big Cube Neodymium Science Magnet for Crafts, Scientific Project, Fridge, Industrial High Powerful Magnets for Office, Home

Quality is tender, but strength is why u bought for a small size. Buy 2 heal muscle and skin inflammation. Use 2 opposite poles to travel alone arms, legs, hands, etc! For healing. Repair of are begins right away. Would recommend

Found stud through cement wall. Very useful!

Strong enough that they can be difficult to handle or remove from steel. Beware these babies can be/are dangerous from just how strong they are.

I just received my two orders of two. While the magnets themselves are great, and dangerous if not handle correctly as in only ever handle one at a time and keep a LOT of distance between them, the packaging was way inadequate. I had two orders arrive in one huge box and all four of them were damaged, two shattered and two chipped badly. Two where wrapped in bubble wrap which was completely CRUSHED where they were stuck to the box of the other two. The other two in the remains of a 3"X3" box with white foam inside which had been flattened to the thickness of a sheet of paper. I've received magnets like these in the past and they've always been shipping in a rigid container, usually either plywood or HARD plastic surrounding them for several inches never with foam or bubble wrap. The might have arrived intact if it was only a single order of two because those two where already together and couldn't snap together. What I can only assume happened is that the two separate orders snapped together at some point, either when thrown in the HUGE box or maybe the bubble wrap popped under the stress of several HUNDRED pounds of force being exerted by four of these monsters wanting to be one. I will be ordering replacements as they are what I needed fingers crossed that the next ones will arrive intact. Also you WILL need a magnet separator to get these apart you will not be able to do so by hand even with only two of them and the plastic separating them.

I had some ideas of what I could use some strong magnets for, but I didn't count on how hard they are to handle. It's like trying to keep Magneto locked up in a metal-free prison. If there is anything magnetically attractive around they keep pulling in different directions. It was everything I could do to get them apart (after reading all of the reviews about how fragile they are if they slam together). I am happy with the strength and with careful handling I should be able to use them but it's not what I was expecting. Don't get these unless you have a real need for them and are prepared to treat them with respect. They aren't toys.

Super strong, worked great for my purpose.

Was looking for a really good rare earth magnet for testing Silver and man this thing is amazing. There is no doubt whether you have pure .999 Silver when using this magnet. And the size is perfect. Large enough to hold onto it, but small enough to not be hardy. Wait till you stick it to metal, the dang thing doesn’t want to come off. Will definitely buy this exact one again if I ever need another one.

Looking for extremely strong magnets to boost an old magneto magnet, and these seem to be about as good as is possible without building an electromagnet with pounds of wire. They come with a thin spacer to hold them apart to prevent pinching. So far, I have been unable to slip them apart by hand even though I have excellent arm and hand strength. These things are spooky strong, and could easily injure a child that didn't understand their attraction. I will be building an apparatus to separate and hold these for use. Update: after building a steel bar mount, I was able to carefully stick the pair of magnets to it, and then wedge the top one off to the side and separate it with a wooden block. I then used this assembly to successfully "recharge" the magnets in my WicoEK circa 1900 magneto. Excellent!