This is one hell of a magnet for the price. No, they are not neodymium and they are not "super magnets". With four of these attached to the back of the 4ft LED strip, it securely holds it upright. I have used almost 100 of these lights in my shop and they have never let me down. The surface is slightly rough and accepts epoxy very well. And they REALLY stick together! The pull force for a magnet tested in the manner shown below is between 0.8 and 0.9 pounds and this number is completely independent of the thickness of the metal surface. I even measured this force on a 400 stainless steel case.
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