This 4-piece geometry set contains one 15 cm straight ruler, two triangle rulers (45° and 60°), and one 180° protractor. It includes tools for drawing, measuring angles, and solving math problems. The rulers which helps resist bending and daily wear. This can be an alternative to plastic rulers that may snap or fade. The non-slip surface and rounded edges allow for steady handling and may reduce finger discomfort during extended use. Engraved markings stay readable over time, which can help avoid measurement errors caused by worn numbers. Students, architects, engineers, and others doing exam preparation, sketches, or technical drawings may find this protractor set useful for school, home, or office tasks., Manufacturer: SNMYGS