Upgraded Multipurpose Ruler - You will get 3 different multipurpose rotatable rulers. A ruler includes: protractor, Y-axis, X-axis, circular hole with radius mark, arc, short drawing slot, movable short ruler, elliptical hole, parallelogram, parabola, built-in triangle, ruler, etc. A built-in ellipse instead of triangles. 360 Degree Circular Protractor - Clear scale and hollow hole are ergonomically designed for easy use. Wide range of applications and practicality - measure lengths and angles, draw templates to compose various flat figures, three-dimensional figures, pattern figures and mathematical geometry. Suitable for elementary and middle school students. A greattool to aid in learning and help develop children's hands-on ability and imagination. HIGH QUALITY - Made of high quality plastic, transparent blue color, clear scale, easy to read, safe, durable, lightweight and not easy to disassemble for rest. Easy to carry and store. color: blue material: plastic Package Contents: 2 x Multifunctional Ruler 1 x 360 Degree Circular Protractor Only the above package contents, other products are not included. Note: Light reflections and different monitors may cause the product color picture to be slightly different from the actual item. Measurement tolerance is +/- 1-3 cm.