Swing arm protractor: designed with a swing arm which can rotate 180 degree, makes you draw and measure angles accurately; The arm is easy to swing from side to side
Transparent blue: the protractor is in blue, and the translucent material makes you easily see what you are measuring
Easy to measure: the 6 inch and 10.5 cm ruler integrated at the bottom provide a horizontal line and make your measuring easy
Suitable usage and occasion: good quality geometry protractor set is suitable for painting, measuring, homework, technical drawing, etc.
Warm note: please find the position of 0 degree or the horizontal line before measuring, otherwise, the measurement data will be wrong