Helix Swing Arm Protractor 180 Degree Rotation

Swing arm protractor rotates 180掳, helps accurately draw and measure angles. Measure angles from left to right or right to left. Easy-to-read inch and centimeter marks. 6" & 10cm ruler integrated at the bottom. Made of translucent material to easily see what you are measuring. Shatter-resistant material for safety and longer durablility. Beveled edges for easy lift and manipulation. Ideal ages, eight and up. Assorted colors (Blue, Teal, & Grey).