How do you set and adjust tools such as squares and protractors?

· Engineers squares require no adjustment because they are fixed, however, they must be checked regularly for squareness

· Vernier height gauges, vernier callipers, vernier protractors and combination squares slide back and forth to the requires height/width/depth/angle and then a thumb screw is used to lock them into position

· Dividers are spring loaded, and can be set using a steel rule to ensure accuracy