Description Innovative zirconia grit gives DeWALT-type 29 flap discs the power to remove material 3X fast than fiber resin metal sanding discs. Type 29 fiberglass backing provides a grinding angle of 20 to 25 deg. A premium abrasive cloth offers a life up to 15X long than fiber resin metal sanding discs. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov