Measuring tool has adjustable protractor arm that can be held in place with the knurled locking nut, quickly and easily identify angles. Widely used in different industries, angle measurement, architectural design, carpentry, length measurement, and so on. Features -Color:Black -Material:Aluminium alloy -Size:20.30X10.00X1.20cm/7.98X3.93X0.47in - Long arm folding design, easy to adjust the Angle and position of the light. - The considerate combination of ruler and protractor helps you to measure things accurately. - Angle will be quickly and easily identified by locking thumb nut in the desired position, and you can fix the identified angle. - This angle measure tool is suitable for setting bevels, drawing radial lines, measuring and marking angles. - Angle protractor is made of metal, with good durability and wear resistance, not easy to rust, and can be applied for a long time. Package list: 1 x Rotating Angle Ruler