Standard Pack = 1 piece(s). Type = Cup Brush ; Brush Diameter = 1 3/4 Inch ; Fill Material = Carbon Steel ; Filament/Wire Diameter = 0.0118 Inch ; Wire Type = Knotted ; Arbor Type = Threaded Arbor ; Arbor Hole Thread Size = 1/4 Inch ; Trim Length = 1/2 Inch ; Brush Color = Gray ; Maximum RPM = 10000 ; Shank Material = Steel ; Shank Included = Yes ;