Master MagneticsOriginal Cast Alnico 5 Cow Magnet - Strong Heavy-Duty Magnets for Cows - Collects Nails and Other Tramp Iron

They are very strong and I use them in my pocket to help with pain in my knee. I know your thoughts but it works.

Many years ago, I fed one of these to my dear daughter. I hoped that the magnet would protect her delicate digestive tract from any nails or barbed wire she might happen to ingest, as it does for our bovine friends.Big mistake. My little girl might have been saved from intestinal perforations, but now that she's grown up, she lives a life of vice and depravity. It seems that the strong magnetic field threw her moral compass completely out of whack.

The poles are at the rounded ends, and so the magnetic field is strongest there.Keep in mind that AlNiCo magnets are moderately strong, but are easily demagnetized by other strong magnets. If you give these to kids who like to see if they're strong enough to push similar poles together, the magnets will become weaker after this kind of abuse. Ferrite/ceramic magnets aren't demagnetized as easily, but AlNiCo magnets are physically tougher and don't chip and shatter as easily as the ferrite/ceramic ones.

I've shown these magnets to two different elementary school classes and both have been hooked by the story and the hands-on aspect. These magnets are a great example of how magnets are used in the real world. They're pretty strong too, so I can use them during class experiments when a stronger magnet is needed.

they have the poles at the edges (not horizontal) that is what I was looking for, and they look enough strong for my use.

These magnets are great. I grew up playing with them as a child and I can tell you nothing sparks a child's interest in science like two powerful polarized magnets! They probably do wonders for metal eating cows as well :)

Shipped fast. Just as described. Very pleased!

Affordable and strong.