12 Pack Heavy Duty Neodymium Bar Magnets with 3M Adhesive - Strong Rare Earth Magnets for Displate - 40x10x4mm

These magnets are very powerful and when placed, it is wise to be sure you have them where you want. Overall they are a good value for what they are, especially given how strong they are. Should note though to be careful when separating them, I made a mistake of not separating the stack far enough or flipping one half quick enough and have a bruised finger to show for the carelessness. I had a good chuckle over it, but feel it is worth reminding that these should not be handled without caution and mindfulness of what they are. The only issue I have with their potency is that the strips are not stronger than their attraction, so they have some issues with being paired for closures.

Used these as a replacement to the weak magnets that came with the metal poster. These rock for their size. The adhesive strips that come with them are the only downside. For a 17"x12" poster it took 3. The magnets could easily hold a heavier poster - it was the adhesive that was weak.

These magnets are strong, even among all the other neodymium magnets of this size that I've used before. They can almost be too powerful, especially if you're not careful and get them close together (pinched skin is a real hazard). They are perfect for holding down items to the bed of my laser engraver.

Strong magnets, easy to break though. Double stick tape is weak and will fall off.

The magnets themselves are great-however when trying to twist them apart 5 magnets crumbled.I paid for 12 was only able use 7.

Extremely difficult to separate and when I finally did they were easily damaged once attracted to other metals. Don't buy!