Reverse the lower rabbeted jaw to get a grip range from 2-1/4″ to 11/16″. Jaws ride on precision guide rods holding the jaw faces parallel, there is no rotating clamp screw bearing against your table to damage the finish. Clamping is accomplished with a large comfortable tri-lobal clamp screw. The deep rabbet engages rounded table edges so your vice won’t rock. You won’t find a more stable, versatile, robust clamp.