This angle measurement protractor can be applied for home or office using. It is very convenient to use, and it is good for completing your work, and a great present idea for workers. Besides, it's also an essential for any toolbox. The numbers are clear and easy to identify, then you can read quickly with great accuracy. Features -Color:Silver -Material:Steel -Size:18.00X9.00X2.00cm/7.07X3.54X0.79in - Made of steel, very light and easy to carry. You can use it with confidence. - The protractors are shape protractor, it is universal, you can applied to solve the math problem frequently. - You can lock the adjustable protractor arm into desired position with knurled thumb nut to quickly and easily identify angles, and adjust the screw if it feels too tight or loose before using the ruler. - Suitable for angle measurement, architectural design, diy drawing, engineering, carpentry, length measurement. - Also proper present for diy workers, craftsmen, architects and designers. Package list: 1 x Rotating Angle Ruler