Radial plastic abrasive discs with embedded cubitron mineral. As the wheel wears, fresh abrasive is exposed. Discs are tough and long lasting. They are gentle to base materials and surrounding details. Brush can be adjusted for specific applications by simply adding or deleting discs. For example, use just a few discs on a 3M990 mandrel for thin spindle sanding, or group up to 28 discs on a 3M991 mandrel for wide area coverage.
