Follow our Moxon vise plan and build your own portable Moxon twin-screw vise. The portable Moxon vise is designed to hold work above the standard height of a workbench. The Moxon vise design is widely attributed to a Joseph Moxon. Joseph Moxon (1627 – 1691), was the hydrographer to Charles II English printer specializing in mathematical books and maps. Moxon’s 17th century book The Art of Joinery first described the double-screw vise. In this historical publication the Moxon vise was documented  – a double-screw held to a workbench top with clamps or holdfasts in order to facilitate certain work.