If you are looking for sanding discs for industrial purposes, there are several things to consider before making a final purchase. First, ask yourself how many sanding discs you are likely to need over a given period of time, as well as how large or small each of these sanding discs are going to need to be in diameter. Once these aspects have been determined, ask yourself what type of grit these sanding discs are going to need to have on them, as well as any special options that you might require on these tools. Finally, determine what your budget might be for these sanding discs, and start looking for the best such products for your particular needs!
Once you have gotten these details straightened out, search online for sanding discs that match one or more of your particular criteria. Search through the results that you find until you are left with a handful of sanding discs that meet your needs well, and then start doing a bit of research on the manufacturers and vendors of each.
Look for customer reviews of the specific sanding discs you are thinking of purchasing, and see what others in a similar situation have had to say about their experiences with these products. Once you know which of these particular sanding discs are likely to bring you the most bang for your buck, make a note of your findings and start your research on specific vendors. See which of the providers of the specific sanding discs you have in mind are most likely to be easy to deal with, reliable, and fairly priced, and make your final purchase from the best such vendor overall that you can find. With any luck your research should pay off nicely, and your sanding discs should prove to be just what you needed!