How many people do you know who have overhead exposed steel beams and girders in their house or place of business?  Then these magnets are for them.  I read another reviewer's post, and I suppose that is how he is using these magnets, but I'll dare to say most people are not attaching their magnets horizontally on an overhead steel beam.  That being said, I did a few tests of my own.  I took a 25lb weight and tried it with one magnet.  Nope.  How about 2 magnets?  Nah.  3 magnets?  No.  4 magnets?  What do you think?  I then when down to a 10lb weight to see if it would stay on the side of a steel locker.  Well, the magnet slid almost 2 the floor, but it did keep the 10lb weight from tipping over and pulling off the strap, once the weight reached the floor.  I did guide the weight and strap with my hand, or the whole thing would have come off the locker.  See photos.  I understand physics a bit.  I get the difference between holding a vertical load and a horizontal load.  I will try it sometime with a horizontal load of 25lbs sometime when I figure out an application for using these hooks for a horizontal load--and I have a horizontal magnetic surface handy.  I suppose if someone had a shop light hooked to an engine hoist / cherry picker and the arm was pretty much horizontal, they could attach a work light in a horizontal fashion and hold it and the hooks in place with these magnets.  I'm not saying they don't work, I'm just saying the advertisement should be more clear about the way the magnets hold a load.  That being said, they are nice looking magnets, and I bought them to hold my keys and carabiners on the side of the fridge.  I also wanted to be able to move them around whenever I wanted.  I wanted these magnets to hold a little bit of weight, but not a huge amount, so they do that.  So, a little more truth in advertising would be nice.  I know it's the seller's job to sell magnets.  I will also do more careful research in the future with my important magnet purchases.  Buy them--just don't expect them to hold much more than your smaller items vertically--and certainly not 25lbs vertically.  I'll report back once I conclude my horizontal experiments, if I can ever think of something practical...

*** UPDATE 9/23/16  ****  I cleaned out a locker, and I TRIED to hang just a 10lb weight from the hook attached horizontally so the magnet had the entire surface of the shelf that is horizontal in the locker from which to draw.  Not even close to holding my 10lb weight.  So, I'm calling a "mythbusting" official BS on these magnets.  Not that anyone else needs to care, but it makes me feel better, lol.  I was skeptical originally that a magnetic surface about the size of a penny could hold 25lbs.  I knew this was something I had to see for myself.  Anyway...these magnets will do a nice job holding my keys on the side of the fridge.  That they will hold...
How many people do you know who have overhead exposed steel beams and girders in their house or place of business? Then these magnets are for them. I read another reviewer's post, and I suppose that is how he is using these magnets, but I'll dare to say most people are not attaching their magnets horizontally on an overhead steel beam. That being said, I did a few tests of my own. I took a 25lb weight and tried it with one magnet. Nope. How about 2 magnets? Nah. 3 magnets? No. 4 magnets? What do you think? I then when down to a 10lb weight to see if it would stay on the side of a steel locker. Well, the magnet slid almost 2 the floor, but it did keep the 10lb weight from tipping over and pulling off the strap, once the weight reached the floor. I did guide the weight and strap with my hand, or the whole thing would have come off the locker. See photos. I understand physics a bit. I get the difference between holding a vertical load and a horizontal load. I will try it sometime with a horizontal load of 25lbs sometime when I figure out an application for using these hooks for a horizontal load--and I have a horizontal magnetic surface handy. I suppose if someone had a shop light hooked to an engine hoist / cherry picker and the arm was pretty much horizontal, they could attach a work light in a horizontal fashion and hold it and the hooks in place with these magnets. I'm not saying they don't work, I'm just saying the advertisement should be more clear about the way the magnets hold a load. That being said, they are nice looking magnets, and I bought them to hold my keys and carabiners on the side of the fridge. I also wanted to be able to move them around whenever I wanted. I wanted these magnets to hold a little bit of weight, but not a huge amount, so they do that. So, a little more truth in advertising would be nice. I know it's the seller's job to sell magnets. I will also do more careful research in the future with my important magnet purchases. Buy them--just don't expect them to hold much more than your smaller items vertically--and certainly not 25lbs vertically. I'll report back once I conclude my horizontal experiments, if I can ever think of something practical... *** UPDATE 9/23/16  ****  I cleaned out a locker, and I TRIED to hang just a 10lb weight from the hook attached horizontally so the magnet had the entire surface of the shelf that is horizontal in the locker from which to draw. Not even close to holding my 10lb weight. So, I'm calling a "mythbusting" official BS on these magnets. Not that anyone else needs to care, but it makes me feel better, lol. I was skeptical originally that a magnetic surface about the size of a penny could hold 25lbs. I knew this was something I had to see for myself. Anyway... these magnets will do a nice job holding my keys on the side of the fridge. That they will hold...