For years, shop mechanics have been brazing and welding shafts to cassette lockring tools to provide stability and to prevent the tool from slipping out of the short splines of the cassette lockring. Now there's an easier way. Just tap the bushing and shaft of the FRG-1 into an FR-5 Cassette Lockring Tool and... presto! Add a Park Tool FRW-1 Freewheel Wrench and you have the ultimate way to remove a cassette lockring. (Shown with freewheel remover, not included.)
Related products: FRW-1, FR-5.