Dewalt XP Extended Performance DW8254 Flap Disc, Type 27, Outer Diameter: 4-1/2 Inch, Arbor Hole / Thread Size: 5/8-11 Thread, Grit: 40 (Coarse), Max Speed: 13300 Rpm, Abrasive Type: Zirconia, Backing: Polyester/Cotton, Bond Type: Resin, Mounting: Threaded, Product / Materials Abraded: Metals For Additional Product Information, Click Here