High quality materials: The angle measuring ruler is made of high quality stainless steel, which features high durability and wear resistance. The product surface is smooth, rustproof and can be used for a long time. 2 in 1 angle measuring ruler: The combination of a ruler and protractor makes it possible to measure the length with a fixed ruler and to measure another length with a movable ruler, which can be easily measured. Easy to use: The angle measuring ruler can rotate the protractor 180 degrees through the adjusting nut, and the ruler can be locked in the desired position at a fixed angle, so that the angle can be measured quickly and easily . Use the precision: The angle measuring ruler adopts metric scale, and the scale on the base and the ruler is laser engraved precisely, then filled with black to extend the service life and make it easy to read. Detachable and versatile: Detachable ruler arm and dial head. Very suitable for students, mechanics, DIY jobs, carpenters and carpentry hobbyists, vehicle maintenance and repair, construction, drawing radial line diagrams, defining bevel angles and offset angles. Specifications: Material: stainless steel Color: Sliver Degree: 0-180 ° Accuracy: 1 mm / 0.03 in. Ruler Range: 30cm / 11.8 in Package Include: 1 x Double Rod Angle Ruler Note: 1.It must loosen the body of the adjustable screw vise. 2 .Avoid scratching the surface of the tool. 3.Please keep cleaning when using and storing. After putting it into the bag for storage. 4.This information about Item size are only for reference, and allow 1-2cm differences due to manual measurement.