Achieve a smooth, professional finish with this 2-pack of 9" backup pads and 15-pack of 150 grit sanding discs designed for the Porter Cable 7800 drywall power sander. The backup pads provide a sturdy base for the abrasive discs, ensuring even pressure distribution and a consistent sanding surface. The 150 grit discs offer an ideal balance between aggressive material removal and a fine finish, perfect for drywall sanding and surface preparation. With this combination, you can tackle drywall projects efficiently and leave walls ready for painting or finishing. Maximize your productivity and achieve superior results with this essential sanding accessory kit.