4 Pack Strong Magnet, 30 x 3 mm 8 KG Pull Super Strong Neodymium Disc Magnets, Magnet Strong with Double-Sided Adhesive, Powerful Permanent Rare Earth Magnets for Fridge, Building, Craft, Office,DIY

We needed some magnets that definitely stuck to steel through a couple of layers of polythene insulation. The added problem was that there was only a narrow gap for us to put the magnets on. After careful use of two layers of aluminium tape for each of the 16 magnets in this pack, our problem was resolved. Unlike so many magnets we have used in the past which can be brittle if dropped, these are smooth on all sides, so don't look as if they will flake when coming sharply into contact with other magnetic items; I think they will be solid enough to last. They are a perfect size for what we need, and we will probably be ordering more, as they seem a bargain! (Basically, the insulated windscreen cover was not as snug a fit as we wanted, and it let in too much light. Careful placing of these around the edges quickly sorted it.) They are small enough so as not to get stuck on every steel item nearby, but still work extremely well.

If you just want an average magnet, then don’t buy these. They are so strong you have a hell of a time trying to separate them as they come in two stacks not only are they stuck on top of another but the two stacks stick together side by side. The magnets I received are so strong I had to try and part them with a blade and when I did get them apart, if there close to any others they snap back together often nipping my fingers. These are very strong magnets and do what they say on the tin and then some.

Strong enough magnets however they can be a little bit brittle and break if they attach to something quickly/from a distance. The adhesive pads are good for solid items, but struggle with fabrics. Decent value for money considering the price.

Great item. I use them to hold workpieces in place on my honeycombe laser bed. Beware..They are incredibly strong so don't catch your fingers when they grab together! Good value for money and well packaged.

Excellent magnets, they are about the size of the batteries you put in various car alarm remote controllers, and are quite strong. I used one to hold a security camera to the ceiling and it does the job very well. I don’t think one could hold 8 KGs, but two together may be able to.

Quite strong magnets, but too small for what I needed them for. I should have read the measurements, so my fault. Otherwise their OK to use on other projects, good value for the money, I can't see them breaking apart. They do include sticking strips, so any installation should be easy enough, being smallish, they don't weigh much. Recommended for smaller Jobs.

Just what I was looking for and needed - thank you!

Shocked at how strong these are! I thought I would need at least 4 of these to hold up a magentic whiteboard to my fridge, but nope, just one is enough! These are a good size and an ideal thickness for the task too. They come with spacers and look weird at first glance until I realised why they are needed, it will be a hard time removing these from anything that they stick to and a child is going to have a tough time removing them, which makes sure the board stays pretty safe