The math geometry tool set is great for artist, designer, engineer, architect, teacher for precise measurements in the classroom, office, or at home.SpecificationColor: PinkMaterial: Aluminum AlloySize: Ruler measure 8"/21cm Length, 1.2"/3cm Width. 45°triangular ruler measure 5"/12cm Length, and 60°triangular ruler measure 5.4"/13.8cm LengthPackage List: 1 x 20cm Ruler, 1 x 45°Triangle Ruler, 1 x 60°Triangle Ruler, 1 x Protractor, Total 4 in one set..AdvantageMade of good-quality aluminum alloy, the triangular ruler set is lightweight and handy. The smooth design will protect your hand when in use. With high-contrast markings, the metal ruler set ensures effortless, accurate reading of each line and number.InstructionAllows you to clearly see the pattern or text under the ruler.NOTEPlease choose the appropriate size before purchasing