The Jo Manufacturing Company produced a wide range of mechanic’s hand tools. The company was family owned through three generations from the 1930s until 1979. The firm was heavily involved in government contracting during the war years. Jo-Line tool names were a variation of the company name and were often biblical. Patents were issued to Robert Woods and R Glen Woods.
Tool names included:
Joda
Jobe – fitting wrench
Joel – torque wrench
Joex
Jote – T-handle torque wrench
Joar – conduit wrench
Jotite – torque wrench
Jomite – torque wrench
Joic – egg beater drill
Jomi
JoTru
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