Standard Pack = 1 piece(s). Arbor Hole = 3/8 IN - 1/2 IN ; Diameter = 4 IN ; Face Width = 1/2 IN ; Material = Crimped Steel Wire ; RPM = 12,500 ; Thickness = 7/16 IN ; Trim Length = 7/8 IN ; Type = Straight Wheel ; Wire Size = 0.006 IN ;