The four-piece measuring tool has clear lines to help you deal with math problems efficiently. Portable and : The geometric tools are made of high-quality brass materials, and long service life, convenient to put in a school bag or desk. Wide range of applications: measuring tools are suitable for drawing, measuring, homework, technical drawing; you can send them to your friends and classmates. Good gifts for children: There are sufficient quantities, which can be given to school children and friends as gifts; it is easy to carry and does not take up too much space. Colour: gold Material: brass Package Contents: 1 x 0-10cm right-angle Triple-cornered ruler 1 x 0-10cm isosceles Triple-cornered ruler 1 x 0-18cm ruler 1 x 0-180 protractor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.