The ruler is made of clear plastic for easy measurement. The plastic case protects all tools and stores them in one spot on a backpack or table for easy portability and storage. Convenient and easy to apply to draw precise patterns, and can also accurately measure the length of things. School math kits are given as students to start math learning and drawing. Features -Color:Black -Material:Plastic, Metal -Size(Box):16.70X6.80X2.70cm/6.56X2.67X1.06in -Size(Ruler):16.00X2.50X0.20cm/6.29X0.98X0.08in -Size(Compass):12.20X2.20X0.90cm/4.79X0.86X0.35in -This Tool Set is perfect for students, teachers, math experts, architects, engineers, artists, designers at any level. -It’s a good helper for artists, engineers, designers, architects, students and others. -Multi-functional and versatile, it can be used for a variety of fields, such as construction, professional applications, architecture, civil engineering, school supplies, etc. -It will work architecture, score measurement, art design or drawing templates as school work. -Portable and light, easy to store, not taking up any space, thus you can store it in your stationery bag. Package list: 1 x Compass 1 x 15 cm Ruler 1 x Protractor 2 x Triangle Rulers 1 x The Eraser 1 x Pencil Refill 1 x Pencil