Check the listing for details. Angle Protractor 0-180 Degrees Round Head Finder Measuring Ruler with 20cm Arm. Condition: New. Listed at 15.73 USD. The angle protractor 0 to 180 Degrees is made of stainless steel with smooth polishing, good durability, and wear resistance, not easy to rust, nickel-plated nut adjustable for tightness, with non-slip texture and smooth edges.The combination of ruler and protractor 2-in-1 design makes it possible to measure length 0-20cm by fixing the ruler, by moving the ruler, the semicircular protractor scale on the top reads forward and reverse from 0° to 180°.The protractor and ruler are made by laser etching technology, the scale data is clear and accurate, and the reading is convenient.The stainless steel protractor can draw at a fixed angle, suitable for setting bevels, drawing radial lines, measuring lengths and angles, and marking angles, suitable for designers, mechanics, carpenters, and woodworking enthusiasts.