DEWALT 4-1/2" x 7/8" 24 Grit Type 29 Hp Flap Disc delivers superior performance with its zirconia grit, enabling material removal that is three times faster than traditional fiber resin metal sanding discs. This flap disc is designed with premium abrasive cloth that lasts up to 15 times longer, providing exceptional durability and efficiency for your metalworking projects. The Type 29 fiberglass backing ensures an optimal grinding angle of 20-25 degrees, enhancing both performance and longevity during use. Model Number: DW8381