The ADVcer sanding discs are a great addition to our finishing products. Based on our own experience, we found them to be durable and long-lasting making them perfect for industrial and scientific use. They are easy to attach to the sander and the range of grits provides great flexibility in sanding different types of surfaces... The only drawback we noticed is that they tend to clog a little more than other brands we have used. Overall, we highly recommend these discs for anyone looking for a reliable sanding solution..