Johnson Abrasives Gold Lightning Discs (80 Grit, 15pk) are the industry standard for dustless drywall finishing applications. These 9in discs are made from the best materials; heat treated white aluminum oxide on durable C-weight paper. Changing out spent discs is a breeze with our hook & loop system. Compatible with Porter-Cable®, Radius 360®, or any 9" disc sanders. Made in the USA. Johnson Abrasives Gold Lightning Smooth-Kut Sandpaper, 9in, 80 Grit, 15pk