With precision clear accurate readings, our angle swing arm protractor is easy to read. The round head protractor has a 0-180 degrees semi-circle scale, can forward and reverse directions to measure any angles. The protractor arm can be adjusted to any angle you want, which is easy to use. And stainless steel material is sturdy and durable, not easy to rust, so can last for a long time. Features - Color: Silver. - Material: Stainless Steel. - Size: 20.00X9.00X0.20 cm/ 7.86X3.54X0.08 inch. - Each angle protractor is in two-arm design, is a fixed ruler, the other arm is a movable ruler. - The considerate combination of ruler and protractor helps you to measure things accurately. - Angle will be quickly and easily identified by locking knurling thumb nut in the desired position, and you can fix the identified angle to plot. - This angle measure tool is suitable for setting bevels, drawing radial lines, measuring and marking angles. - Angle protractor is made of quality stainless steel, with good durability and wear resistance, not easy to rust, and can be applied for a long time. Package list: 1 x angle ruler