[Product Content] You Will Receive 2 Round Rulers And 1 Semi-Circular Ruler.The Size Of The Circular Ruler And The Semi-Circular Ruler Are Universal, And The Color Is Transparent, Which Is Suitable For Students To Draw And Measure Angles. [Product Material] This Protractor Set Is Made Of Plastic, Which Is Lightweight And Durable.The Plastic Material Ensures The Transparency Of The Ruler, Facilitates Accurate Measurement And Drawing, And Is Not Easy To Break. [Precise Design] This Product Is Precisely Designed, With Clear Scales For Both Round And Semicircular Rulers, Which Are Easy To Read Values.The Protractor Is Designed With A Swivel Arm, Which Is More Convenient To Use And Is Suitable For Various Drawing And Measurement Needs. [Easy To Carry] This Ruler Set Is Lightweight And Portable, Suitable For Students And Professionals.It Can Be Easily Placed In A Stationery Box Or Backpack For Drawing And Measuring Anytime, Anywhere. [Widely Used] This Product Is Not Only Suitable For Students To Learn Drawing On A Daily Basis, But Also Suitable For Engineers, Architects And Other Professionals To Use.It Is Widely Used In Many Fields Such As Mathematics, Physics And Engineering.