Backing Plate Adapter.
AMMCO Backing Plate Adapter 2" Arbor 5-3/16" Diameter
Ammco Brake Lathe Backing Plate Adapter 1-7/8" Bore x 5-7/16" (Inv. #23)
Brake Lathe Clamping Backing Plate Adapter 2" Bore x 6-3/4" for Ammco (Inv. #40)
5/8"-11 to 1/4" Shank for Electric Drills -Buffer/Polisher Backing Plate Adapter
5/8"-11 to 5/16"-24 Polisher Buffer Backing Plate Adapter
5/16"-24 to 1/4"-20 Polisher Buffer Backing Plate Adapter