Premium aluminum oxide grain with grinding aid.Excellent for reducing heat build-up on heat sensitive materials.Excellent for cleaning, deburring, polishing, blending., Resin over resin construction for a strong bond that is resistant to heat and moisture.Closed coat structure for more material removal.High quality Egyptian cotton cloth backing provides superior durability.UPC bar coded labeled boxes for easy identification and inventory maintenance.See Accessories for Straight 1/4" Shank Adapter Kit.