Dewalt High Performance DW8306 Flap Disc, Type 29, Outer Diameter: 4-1/2 Inch, Arbor Hole / Thread Size: 7/8 Inch A.H., Grit: 36 (Coarse), Max Speed: 13300 Rpm, Abrasive Type: Zirconia, Backing: Fiberglass, Bond Type: Resin, Mounting: Arbor, Product / Materials Abraded: Metals For Additional Product Information, Click Here