Toolmakers Precision Screwless Vice

This vise is called a screwless vise because there is no long adjusting screw running axially the length of the vise. The vise is tightened with a socket head cap screw that pulls down at about a 45° angle. Because of this angle, the movable jaw is pulled down as well as closed when the screw is tightened. This prevents the movable jaw from lifting as the vise is tightened.