Rigid 10 pipe wrench

[daddy1]

Anyone have any info on The Mack Tool Company, Eldrya, Ohio that manufactured a Rigid 10 pipe wrench?

[BHD]

Just a guess here but it may be this company,
http://www.mactools.com/Mac/
they were and may still be operating similar to snap on, I had a friend back in the 1970's from the mid west that had a nice set of MAC tools,
there were targeted to professional mechanics, and trades men.