Sanding Belt and Disc Cleaner. Most belts and discs are discarded because they are clogged, not worn out. When held firmly (and carefully) against a running belt or disc, this rubberized substance removes the gummy clogging and restores the cutting ability. Abrasive life is extended many times, and downtime to change belt or disc is also reduced. Not to be used on wide belts or conveyor-type sanders. 2" x 2" x 8".