4Pcs Rubber Coated Magnets, 30LBS Bolt on Magnets with M6 Threaded Studs and Nuts, Strong Flag Neodymium Magnet Mount Base with Rubber Coating Non-Slip, Anti-Scratch for Light Bar and Add Mirrors

really strong. Used to hold a 1/8" plexiglass sheet on fridge side. No screws required.

One recommendation would be to either make them a bit thicker and deepen the thread depth or supply shorter screws. Using them to mount power strips under desks and other than one, the screws stood do proud that the power strip keyholes could not hold onto them. Not a deal breaker, the magnets are quite strong, but its a thought.

These magnets are very strong. They work well for attaching things that a simple hook will not work on. The non scratch coating is great at protecting the surface.

It is actually a cluster of small magnets that make up the "magnets" advertised. Regardless, they are extremely strong and worked perfectly for the project I needed them for.

The magnets are quite strong & work as expected. However as others have mentioned, the screws are longer than the base is thick, so if you're mounting something thin like a mounting bracket, the screw will poke through the magnet base making it unstable, as you can see in the pics. I had to stack some washers onto the screw in order to tighten it all the way.

Worked like a charm, and stronger then I thought.

Very strong magnet. Using to hold stuff on car when camping.

I used these for my tractor, they hold my rear view mirrors on the arms of my bucket.

Like impressively strong. I use them for mounting a keyboard tray and some other devices to the metal bar of my sit/stand desk and they hold *really* well. Listing says they hold up to 30lbs and I'd believe it.

Ordered a bunch of the Anti-Scratch Mounting Magnets Strong M4 Male Thread stud. They arrived when they said they would and the price was right. Previously purchased elsewhere but then that seller doubled their price so I looked around and found these. They've been great so far. Description isn't 100% accurate but I received the kind I needed. There is no male stud in the magnet, there is a female threaded screw hole and M4 screws are included. Works great for what it's meant to do. Holds the parts fixed to the metal enclosure without slipping. Will probably come back for more as long as the price doesn't jump.

really strong

We ordered 2.6” and the bag even said 2.6” but then they cam they were just shy of 1.75” Good and strong but wanted the bigger ones

These hold really super strong. Originally used 43 mm magnets and they were 2 small. These are much bigger and stronger. It's really hard to get the rocklights off the frame. Not concerned about losing a rock light offroad. I made brackets for the lights and then bolted magnets to bracket.