"Wild Bill" wrote in message
...
A standard size switch knurled nut is about .590" diameter, although I
think
I've seen larger, less common ones.

The end opening on my K-D Tools pin retainer tool is about .833 diameter
(and tapering inward). I didn't have a new retainer to measure.

WB

The one I have is about the same size with a slight taper, so I'll probably
go with the "brake shoe retaining spring tool" answer unless I find some
evidence that it's for something else.

Rob