Cup Magnets with Countersunk Hole for #10 Bolt, Magnet with Screw, 1.26" Diameter, Industrial Strength Round Base Magnets for Magnetic Mounting, Super Power 90 lbs Holding Force, Pack of 6

The strength of the front of the magnet is great (i was worried because the back/smooth/non-countersunk side is not super strong, but still kinda strong). I'm using two to hold a panel hiding storage under my back deck and had to leave a bit of air gap between them and the metal bracket on the panel so the hold wasn't too strong! Looks pretty well sealed, so should handle the weather, will update if they don't.The supplied screws look nice, but I didn't use them since I was screwing into some pretty weathered wood and they aren't that long. The countersink is standard, so any deck or drywall screw should work great.The only down side might be that the strong side isn't very pretty and doesn't have super smooth edges so it might scratch the paint on anything you stick to them. The back side is pretty and smooth, but not countersunk and not as strong, but you could counter sink it (enough material there) and use it for less heavy duty stuff.

This is a superb product. I recently purchased a rechargeable battery operated light for my closet. It came with an adhesive backed magnetic aluminum strip. I decided to relocate the light but the very strong adhesive strip removed the paint and the drywall of the closet wall and the strip could not be re-used. Then I purchased a 3M magnetized tape which did not hold the fixture to the wall. Then I tried some heavy duty magnet strips which had inadequate adhesion. Finally, I purchased the cup magnets and installed them with plastic screw anchors (not provided) in the drywall. One small hole to patch instead of a large piece of damaged drywall if I need to remove the magnet. I highly recommend this productThe magnets are very well made and unbelievably strong.

These magnets are so powerful, taking them out of the box was a comedy of errors. If anything metal is near by, they will snatch it up. First they stuck to my belt buckle and I could hardly remove them. When I did they flung across kitchen and stuck to pots and pans. After one landed in a box of paper clips it took about 5 minutes to undue that mess. But once I finally got them away from random metal objects and installed in their intended location they were great! Work perfect to hold up a 30 lb. moving backrest on my boat.

Great little magnets! Needed something to hold a handmade Welcome sign to a steel door. Bought some magnets from a craft store but they were not strong enough to hold the weight. 2 of these hold tight to the door. Well worth the price paid.

The media could not be loaded.  Great strength- lower points in being to separate them because if you move the plastic white washer between each one GOOD LUCK LOL. I use these for multiple reasons. Door stop when open, cell phone holder to expand the metal/magnet set I bought online. So now all over the house I have areas where I can clip my cellophane to a convenient place I chose!

I didn't want drill into my trunk to attach an amplifier. I just used the correct size screw,washers and nut to attach one of these to each corner of the amp. I poked a small hole in carpet so the magnets would have direct contact to the trunk metal and the screws popped through the carpet. Works great and no matter how hard I whip the little Miata in a turn the amp basically is glued in place. I did try to order rubber coated models but had 3 failed orders so I gave up and saved some money and bought these. Hope they don't scratch the paint in the long term.

Does not magnetize bot sides.

Durable and safe: when dropped on a concrete floor, they do NOT break--no sharp edges to draw blood. Strong: incredible magnetic force. Challenging: if, like me, you make the mistake of removing the white plastic spacers separating the magnets, then you may need the following tools to get the magnets apart: wide-jaw pliers, steel bench vise, hammer, and cold chisel. Lesson: leave the spacers in place until you a ready to mount a magnet. THEY ARE NOT TOYS! Definitely not for children.