Description: brand new,high quality Features: The ruler can be used as tools in the classroom to meet the measurement needs of teachers and students, it is also good tool for measurement in daily life. The straight ruler is made of plastic, sturdy and durable, not easy to deform or damage, suitable to serve your repeated uses, you can feel free to use without worrying about the quality. Can be used as an angle parallel ruler, straight line, horizontal parallel line, arc measurement, etc. Can be used as a protractor, 0-180 degree angle measurement or scribing (1 small grid 5 , a large grid 15 degrees, the angle displayed by the dial, is the degree of opening of the ruler). The tip of the angled disc in the middle of the disc is the center point of the circular arc, which can draw a circle or arc of 4-30cm diameter. Put the ruler vertically, open the ruler 90 degrees, pull down the right scale in parallel, and draw a uniform parallel line. Open the ruler to a 30cm scale and draw a straight line. Straight Ruler ionly, other accessories demo in the picture is not included. Specifications: Item Type: Straight Ruler Material: Plastic Size: approx.30cm/11.81in Color: As Picture Shown Quantity: 1 Pc Note: Transition: 1cm=10mm=0.39inch. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 1 x Straight Ruler