WOW!!! Got a tell ya, these are no joke. I had these magnets not more than 5 miniutes, one in one hand and one in the other, about 5" apart! This is what happened! I cut my finger trying to stop them from connecting. Be careful. I have never seen magnets this powerful. They are extremely brittle and will shatter if they hit a metal object or another magnet as you can see. Extremely strong!! I give them 5 stars because of there strength!

Very strong little magnets. I used them to hold up a metal sign and it's almost impossible to pull off. Down side, these magnets are very brittle. I drop them on the carpet and they slammed together and shattered.

Excellent product. Very strong magnets as described. I used them to put one in my cell phone case (iPhone 6 plus with an Otterbox case) and put one on the cellphone holder in my truck. Now the phone stays on the holder with just the magnets and it is easy to remove and replace. The magnet is strong enough that it will hold my phone on a vertical metal surface.