This quick-change sanding disc is perfect for use in welding, metalworking, and in maintenance, repairs, and operations. It can withstand grinding speeds up to 30,000 RPM. This one-inch diameter sanding disc has 60 grit aluminum oxide abrasive and YF-weight polyester backing that is water-resistant. This roll-on disc can be run wet or dry and is resin-bonded for heat resistance.