1、PROFESSIONAL MULTI FUNCTION: Professional casting combination angle ruler, support easy marking, fast and accurate position, simple operating. Can be used for length and depth measurement, drawing line without worry, convenient and quick, one ruler multi purpose 2、FLEXIBLE AND ADJUSTABLE: Fixed value limit adjustment ruler, angle disc middle screw limit adjust ruler position. With fastening nut, you can move the ruler freely to measure 3、MULTI DIRECTIONAL ANGLE: The combination angle ruler supports 0-360° all round rotation and fixing, comprehensive angle measurement, no dead angle, and a wider range of applications. The inside and outside angles can be measured, and the measurement and drawing is done 4、WEAR RESISTANT ALUMINUM ALLOY: Woodworking combination angle ruler adopts aluminum alloy angle plate, wear resistant and more long lasting. Integrated molding with fine workmanship, fall resistant, possess strong erosion resistant 5、CLEAR SCALE: The universal vernier bevel protractor is equipped with metric imperial dual scale, which adopts fine technology for high accuracy manufacturing, legible and long lasting