Features: Quality Material: Made of plastic All the tools packaged nicely in a clear plastic storage box very easy to carry and store. Wide Application: Reusable rulers are useful tools for architects engineers artists designers students teacher and so on; Especially good for students in school use. Great Performance: Clear color makes you measure easier; Protractor measures 0 to 180 degrees left to right and right to leftgeometry tools are constructed of plastic material lightweight easy and handy to be put into your school bags or in your desk. Good Gift: It's also a perfect gift for your kids and friends easy to take to class and to store in the classroom and at home. Just choose it as school season gift or Christmas gift. Customer Service: If you confront any problems about our products please feel free to contact us we are ready to help. We will solve your problems as soon as possible. Specification: Material:ABS includes: 4pcs Ruler "