This one-inch diameter quick-change sanding disc can withstand grinding speeds up to 30,000 RPM. It has P100 grit abrasive and YF-weight polyester backing that is water-resistant. This roll-on disc has an aluminum oxide abrasive and can be run wet or dry. It is resin-bonded for heat resistance. This sanding disc is perfect for use in welding, metalworking, and in maintenance, repairs, and operations.