Our measuring stick system consists of six interchangeable extruded aluminum bars. The proprietary, cross-sectional profile provides unprecedented adjustment ease with absolutely rigid joints. The MS-96 "points" are uniquely designed to keep the contact faces on an exact centerline. The lack of an offset insures dead accurate measurements in one plane that quickly earns your trust. Unlike shop made measuring sticks, there are no slots in our stick sections. Opposing sliding dovetails "jam" to each other by locking knobs located on a single face of the assembled tool. This design accomplishes three important objectives. The "wedged" dovetails create joints that refuse to move (measuring sticks that "slip" are worthless).