Ideal for drafting, design, mathematics and fine art projects, this light-weight, ruler features a 180º protractor for precise angles, scales in both inch and centimeter calibrations and 1/8" and 1/4" architectural scales. The ruler divided into a 1/8" grid as well as a 1/10" grid. Details:12" (30.48 cm) light weight ruler180º protractorFlexible plastic constructionGraduated edge allows for smudge free inkingTransparent for easy viewing