Friday, December 30, 2011

A 9/32" Square Drive Sliding T-Bar

I thought this drive square looked a bit odd. I put a caliper on it and read 9/32".

It seems that Snap-on introduced this size around 1925. This tool's bar carries the ID 'Snap-on-M-5'. Here's a link to some more information.

I guess it's safe to say that 9/32" square drive fell by the wayside. I didn't know it ever existed.

I'll put this in the drawer where I keep a few seldom-used specialized wrenches.

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