This item features: -Broad grit range. -High removal rate. -Long service life. -Low noise. -No vibration. -Non loading. -Quick change hub available. -Quantity: 10 per pack. Model Code Model Description AADia.:4 1/2 in, Tool Shape:Conical, Type 29, Arbor Diam:7/8 in, Grit:120, Speed:13300 rpm [Max], Abrasive Trade Name:A-Cool, Abrasive Material:Aluminum Oxide, Mounting:Arbor Hole ABDia.:4 1/2 in, Tool Shape:Conical, Type 29, Arbor Diam:7/8 in, Grit:24, Speed:13300 rpm [Max], Abrasive Trade Name:A, Abrasive Material:Aluminum Oxide, Mounting:Arbor Hole ACDia.:4 1/2 in, Tool Shape:Conical, Type 29, Arbor Diam:7/8 in, Grit:24, Speed:13300 rpm [Max], Abrasive Trade Name:Z, Abrasive Material:Zirconia, Mounting:Arbor Hole ADDia.:4 1/2 in, Tool Shape:Conical, Type 29, Arbor Diam:7/8 in, Grit:40, Speed:13300 rpm [Max], Abrasive Trade Name:Z-COMPACT, Abrasive Material:Zirconia, Mounting:Arbor Hole AEDia.:4 1/2 in, Tool Shape:Conical, Type 29, Arbor Diam:7/8 in, Grit:60, Speed:13300 rp