Inch and metric calibrations: Each ruler simultaneously has inch and centimeter calibrations, which allows you a flexible use in most situations.
Transparent ruler: The t-ruler is made of transparent plastic, which is easy to see the underline notes, good for drawing columns or checking the layout.
Easy to calibrate: Designed with quality plastic head that is convenient to calibrate on each side of the t-square ruler.
Practical tool: This t-shape ruler is utility tool for engineer, architect, student, draftman and artist.