When it comes to purchasing strong magnets, there are several reliable sources available. One of the most common places is specialized hardware stores. These stores often carry a variety of magnets, including strong neodymium magnets. They are well - stocked with different sizes and shapes of magnets, catering to the needs of DIY enthusiasts, hobbyists, and small - scale industrial users. For example, a local hardware store might have disc - shaped neodymium magnets in various diameters, which can be used for simple projects like creating magnetic holders for tools in a workshop.

Online marketplaces have also become a popular option for buying strong magnets. Platforms such as Amazon, eBay, and Alibaba offer a vast selection of magnets from numerous sellers around the world. On these platforms, customers can easily compare prices, read product reviews from other buyers, and choose from a wide range of magnet specifications. For instance, if you need large - sized, high - strength magnets for a scientific experiment or an industrial application, you can find them on these online marketplaces. Some sellers even provide custom - made magnet solutions, allowing you to order magnets with specific dimensions and magnetic properties.

Another source is magnet - specific suppliers. These companies focus solely on manufacturing and selling magnets. They usually have a more comprehensive product line, including rare - earth magnets, ceramic magnets, and alnico magnets. Magnet - specific suppliers can offer expert advice on choosing the right magnet for your particular application. For example, if you are working on a magnetic separation project in a mining operation, they can recommend the most suitable type of magnet based on the properties of the materials you need to separate. Additionally, they often provide technical data sheets for their products, which detail the magnetic strength, operating temperature range, and other important characteristics.