Material: the ruler body is made of steel and the angle frame is made of aluminum alloy, which is durable and has a long service life Kit specifications: measuring range of the ruler 0-300mm, height of the angular frame 115mm, with protractor, center point measuring instrument and line drawing needle Precise scale: laser scale on the surface of the ruler, the figures and scales are clear, 2mm thickened ruler body, not easy to wear Versatile ruler: the angular frame is equipped with an automatic adjustment nut, which can adjust and measure at will. It also has the functions of a protractor, center point measuring instrument and level gauge Widely used: professional measuring tools, suitable for measuring angle, length , the center of the measuring circle, the standard angle of 45, etc