【Strong & Sturdy】Our combination angle ruler made of stainless steel, wear-resistant, corrosion-resistant, safe and non-toxic, won't break easily, strong and durable.【Precise measurement】 The range measuring range is 0~300mm, level gauge equipment makes the measurement accuracy higher, clear and precise calibration will not easily disappear.【Multi-functional measuring tool】This square ruler can measure a variety of data and can measure right angles, 45° angles, 45° inclinations, lengths, depths and widths. Professional Engineer Measuring Tools.【Easy to Use】This multifunctional square ruler is simple and convenient to use. It only needs to be calibrated. It can be used directly where you need to measure, and it is convenient for your operation.【Scope of application】This combination angle ruler is suitable for measuring, marking, laying, etc., for help you to measure accurately, widely used in home, engineering measurement, housing construction and other places. Note: The data are all manual measurement, please allow some 1 - 3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received.