Industrial and Scientific tools require better quality sandpaper .As a result of my tests, I determined that these sandpapers were harsh on the surface, left uneven marks and were not long-lasting. The only positive aspect was that they were easy to attach to the pneumatic tool. The cons overweigh the pros as these sandpapers failed to deliver the promised performance. i won`t recommend it to anyone who is looking for quality sandpapers for their industrial power tools..