Diablo Flap Disc *Diameter: 4-1/2 in. *Arbor Size: 7/8 in. *Material: Zirconium *Product Type: Flap Disc *Grit: 80 Grit*Number in Package: 1 pc. *Usage: Grinding and Polishing Metal *Grit Type: Medium *Type 29 Conical design * Premium zirconium grain blend for up to 10X faster material removal compared to standard grinding wheels * Special flap design offers flexibility and provides for a cushioned grinding effect* High performance flap discs combine two steps in one by simultaneously grinding and polishing *For use with angle grinders