DCC045040N01F Diablo 4-1/2 in Corner-Edge Flap Disc 40 GritDiablo's Steel Demon™ Corner-Edge™ flap discs feature a premium zirconium 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 Blend - a superior quality formulation designed for fast material removal and long sanding life Corner Edge Desgin - an unique rounded edge for maximum performance and accessibilty to reach the most diffult grinding areas. Delivers up to 10X faster material removal than a grinding wheel Type 29 - Conical design Arbor - 7/8" (No HUB) Diameter : 4-1/2 in GRIT : 40 HUB TYPE : 29 RPM : 13280