Last Updated: Dec 17, 2017     Views: 1

 Thanks for your question about jacks. Attached are: a bibliography of resources, articles, and web information about a variety of suppliers with their specifications and detail. We do not have as much about their manufacture since they are metal workers’ specialty. 

The dimensions of the standard cup jacks from Carlo Dona on Spiral Arts web are:

    Blade style = Straight 

    Handle size = 1-1/2" (38mm) wide

    Blade length = 8" (203mm) long

    Overall Length = 16-3/4" (425mm)

Their website has 5 different sizes.

Below are some links to sources, blogs, etc. The bibliography lists other sources as well.

Hope this information is helpful in your search.

Best regards.

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