The MIKEDE 15x3mm magnets do come with screws, and they're designed to be flush when installed, thanks to the countersunk hole. That's what we found in our research, anyway.

The manufacturer describes these magnets as having strong magnetic properties and a tough build. They come with an epoxy coating to resist corrosion and keep the surface smooth and shiny. The screws are included so you can securely attach the magnets to various surfaces, both ferrous and non-ferrous.

But, here's the catch: while the design sounds pretty solid, experiences differ. Our research shows that some folks weren't totally impressed with the magnetic holding power. They're often compared to standard screws you could get at a hardware store, which might not work so well for heavy-duty tasks.

There have also been mentions about issues with polarity and the depth of the countersinking. This can sometimes mean the screws don't sit as flush as you'd hope, especially if you're trying to attach things from opposite sides.

So, these magnets can be great for lighter projects or crafts, but if you need something with more holding power for heavier jobs, you might want to look at other options. If your projects require stronger magnets, consider looking for ones with higher specified holding capacities. It's all about balancing what you need versus what these magnets can do.

So, about the MIKEDE 15x3mm countersunk magnets—they all have the same polarity on the countersunk side. That means if you're using them in a project where you need the magnets to attract each other from that side, you might hit a snag, since it'll only work if you flip them to the flat side.

Our research shows this uniform polarity can be a bit restricting, especially if your project requires the magnets to attract on similar surfaces. Some folks have mentioned it complicates things when you want the magnets to connect back-to-back. You might have to flip them, which isn't always the best solution, or look into finding other magnets with the opposite polarity.

Besides the polarity quirks, the manufacturer notes these magnets are quite strong, with an epoxy coating for corrosion resistance, and they're great for things like tool storage and crafts. Despite the polarization hiccups, a lot of people find them strong, good quality, and affordable.

If your specific project needs magnets with differing polarities for them to align oppositely, you might want to explore some other options.

Another idea is reaching out to MIKEDE to see if they can customize something for you. Just be aware of the polarity challenge to make sure they fit your needs.

The MIKEDE 15x3mm neodymium magnets are pretty strong and popular for various DIY projects and light-duty work. They are made from high-quality neodymium and come with a countersunk hole for screw mounting, which makes them easier to use.

But, there are a few things to watch out for. According to our research, some folks noticed an issue with the magnetic polarity. Apparently, the magnets often have the same polarization direction throughout the pack. This can be a problem if your project needs the magnets to attract each other, like when aligning panels or securing lids. Instead of attracting, they might repel if they're oriented the same way, making things a bit tricky.

Another thing is that they have a countersunk hole on only one side. So, if you mount them with the flat side against a surface, the screws might stick out a bit since the countersink doesn't go through to the other side. Depending on your project's needs, this might not matter. But if you need the screws to sit flush, you might have to get creative with washers or tweak the surface.

Overall, these magnets get good marks for strength and can handle a variety of tasks like hanging small items and crafting.

Just remember, if you need precise alignment or heavy-duty strength, there could be some limits. Knowing these quirks can help you get the best out of them for your projects.