Triangular scale is designed for professional engineers with three color-coded, rubber, center strips for easy identification of scales. 12" scale is fully divided in three with 10, 20, 30, 40, 50 and 60 parts markings to the inch. Triangular scale is made of aircraft-grade aluminum.
Two-in-one protractor and compass lets you easily make angles and eight sizes of circles with built-in templates
You can also use this handy device to measure angles
Angle and Circle Maker is made of plastic
The layflat design easily fits in your binders and drawers