Kingdom Abrasive Pro-Net Sanding Discs come with multifunctional net sanding material, Pro-Net combines high performance and a longer lifespan than traditional abrasives, making it a cost effective solution. Designed for both Wet and Dry sanding by machine or by hand, its true dust-free sanding characteristics result in a cleaner work environment, as well as a better surface finish. The six inch discs have a hook and loop backing for easy attachment to popular sanders. When used with our Abrasive Multi Holes Premium Long Hook velcro pad (2QSD62D) with a vacuum sander, dust Collection is incredible, and the abrasive lasts 10 times longer than conventional abrasives and also better performance than most of the name brand on the market.