DCX045040N01F Diablo 4-1/2 in Flap Disc 40 Grit - Type 29 Diablo's Steel Demon™ flap discs feature a premium zirconium grain blend for up to 10X faster material removal when compared to standard grinding wheels. The flap discs' special flap design offers flexibility and provides for a cushioned grinding effect. Diablo's high performance flap discs combine two steps in one by simultaneously grinding and polishing.Premium zirconium grain blend is a superior quality formulation designed for fast material removal and long sanding lifeDelivers up to 10 times faster material removal than a bonded grinding wheelType 29 - Conical designArbor - 7/8 in (No HUB)Ideal For : Grinding & Polishing MetalDiameter : 4-1/2 inGRIT : 40HUB TYPE : 29RPM : 13280