2PCS 9 Inch Support Pads Discs Sanding Backup Pads Fit for Porter Cable 7800 Dry-Wall Sanding Machine, with Sandpaper

["Compatible models: Fit for Porter Cable 7800 drywall sander for most 9\" discs sanding tools","Function: Sandpaper grinding pad serves as a flexible buffer layer between the sandpaper and the grinding machine tray, ensuring that the sandpaper is smoothly and evenly attached to the wall, and evenly distributed the force, thereby enhancing the smoothness of the grinding process and prolonging the service life of the sandpaper","High-quality material: Made of superior materials, it possesses both elasticity and supportiveness, is resistant to tearing and heat-resistant, and has a long service life","Reusability: Sandpaper polishing pad can be disassembled and reassembled multiple times without losing its grip, thereby saving replacement costs","Installation: Installation is simple. It is easy to disassemble and install the grinding disc quickly"]