MasterPro Refinishing 7 Inch Diameter Backing Plate - 67-057 Part #: 67-057 Line: MPR MasterPro Refinishing 7 Inch Diameter Backing Plate Manufacturer's Defect Warranty Diameter (in): 7 Inch Thread Size: 5/8-11 Inch Type: Backing Plate Arbor Size (in): 5/8 Inch Show More Show Less