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