Features: Metal ruler set of learning tools can meet daily learning and life needs. Geometry ruler set is easy to use and carry. Whether you are drawing, measuring length, it can provide you with accurate data, improve work efficiency and ensured the quality of work. As a gift for mathematics home and for students who want to start learning and drawing math. Suitable for use in school, office, home, or on the go. This geometry set is perfect for students, teachers, math experts, architects, engineers, artists and so on. Specifications: Component: Metal Size: about 16.5x7cm/6.50x2.76'' Type: 2 Kinds Optional Package Includes: 4 Pcs/Set Ruler Set note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.