3M's 4-ply radial brushes are like supercharged flap sanders. The abrasive-filled finger/bristles conform to round surfaces to remove rust, polish metal or to sharpen flutes on gouges. Contains 1 each of 80, 120, 220 and 400 grit, plus 1 each of 6 and 1 micron.

Note: These brushes must be used in one direction only. The fingers on the brushes must face the opposite direction of the machine's rotation.