1.Geometry drawing tools kit for students of different grades at school 2.Ideal gift for school students 3.Easy to take to class and to store in the classroom and at home Specifications: Case dimension: 6.9*3*1.1"(17.5*7.5*2.8cm) Material: Plastic Weight: 115g/4Oz. Package Includes: 1* Shatterproof Box 1* Graphic Compass 2* Triangle Rulers 1* Straight Ruler 1* Protractor 1* Mechanical Pencil 1* Pencil Lead Refills 1* Eraser Protractor : Easy-to-ReadRuler : Transparent Color for Better VisibilitySet Square :(30°/60°)Set Square :(45°)Compasses: Easy to Handle and Use Pencils: 0.5 mm Black Plastic Mechanical Pencil to Help Visibility When Drawing Circles.Great for Drawing Circles and Writing. Pencil Lead: A Package of 0.5 mm Lead Eraser：Erasing easily , leaving no trace. How to use compasses: Open the compasses to the radius desired for your circle.Place the compass point on a piece of paper where you would like the center point of the circle to be.Place the point of the pencil/lead on the paper.Rotate the compass to mark a circle on the paper with the pencil.Draw without lifting the point of the compass off the paper.