Material: The ruler is made of high quality plastic, durable, not easy to wear and break, high definition and precise centimeter (angle) unit to ensure the accuracy of the data. Safe compass: This compass is easy to use; sturdy and durable, maximum diameter up to 25cm, with pointed protective sleeve, safe for children. Easy to carry: all geometry tools are packed in a transparent box, easy to carry and storage, suitable for teachers and students, it is a good gift set for mathematics, geometry, art, drafting and drawing Set of 8 geometric compasses: includes 1x compass school, 1x pencil lead refills, 2x triangle rulers, 1x protractor, 1x straight ruler, 1x mechanical pencil and 1x eraser. Apply to: 8 piece geometry set suitable for teachers, students, woker, can help students solve all basic geometry compass set projects. Specification Product Name: Geometry Set Material: plastic + stainless steel Size: 18cm * 8cm * 2.5cm Package: transparent box Package includes 1 X Geometry Set Note: This does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to differences between different monitors, the picture may may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!