Fully hardened and ground datum faces to resist wear. Centrally mounted protractor vial allows unrestricted viewing. Precision rules with deeply etched graduations on both sides or ease of reading and long life.
protractor has full 360" scale plate, graduated 0-180"-0, includes vial. Square head offers the following fixed angles: 45" and 90". Centre head offers a fixed 90" angle, for finding the centre of round bar stock up to 120mm diameter.