Standard pack = 1 piece(s). Type = Cutting Wheel ; Wheel Diameter = 4-1/2 Inch ; Hole Size = 5/8"-11 UNC ; Wheel Thickness = 1/8 Inch ; Grade = Medium ; Abrasive Material = Zirconia Alumina ; Maximum RPM = 13300 ; Grit = 30 ; Reinforced = Reinforced ; Bond Type = Resinoid ; Wheel Hardness = T ; Wheel Color = Black ; Wheel Type Number = Type 27 ;