Flexidiscs more than 20 years old had a different shaft design with two identical steel nuts.
The plate is usually silver coloured instead of the green one shown in the photograph.
The old style shaft has two identical threads separated by the flexible cable.
If the cable stretches the threads no longer line up so the bottom nut often cannot be removed.
Spare parts for this version are not available.
The name was originally
but has been replaced by
Old style Flexi-disc sander
if you need any further advice.
B & D Murkin
UK main importers for
Le Tonkinois varnish