Makes surface preparation fast and easy. Great for removal of undercoatings, stone guards, seam sealers and rust. Open mesh disc made from a tough, abrasive impregnated material . Perfect alternative to wire brushes for tough clean-up jobs on almost any type surface. Discs are used with 3M wheel mandrel4, x 1/4,, 10 discs per bag.  Works well under hood webs, in truck beds, door jambs, under carriage and wheel wells.  Maximum operating speed: 6,000.