These SuperMax 25-Inch Drum Sander Abrasives revitalize your sander's performance as soon as you install them, and they're cut to fit specific machines. They suit SuperMax-brand sanders with 25-inch drums and General-brand sanders with 24-inch drums. These SuperMax 25-inch drum sander abrasives match the precise size of these drums, so they will not overlap when you install them. Their tight fit maximizes the effect of the aluminum oxide grit and ensures even performance from one side of your material to the other. SuperMax aluminum oxide abrasives support bi-directional installation, which means you can install them in either direction without any loss of functionality. They have heavy backing materials that withstand intense pressure without ripping or shredding. Consistent 80-grit abrasion levels allow you to complete light and moderate sanding jobs for all sorts of projects.