A Practical Ruler Geometry Set is , the Ruler will not bend or flex during use, and the ergonomically designed Ruler head is comfortable to hold. Universal holder Ruler work with any standard sized pencil or pen. Also, the rulers, triangles and protractor feature a graduation for easy identification along. With a storage box, it is easy to carry and store. Features -Color:Blue -Material: -Size:20.70X3.10X0.10cm/8.14X1.22X0.04in -Size:12.30X7.10X0.10cm/4.83X2.79X0.04in -Size:12.20X6.20X0.10cm/4.79X2.44X0.04in -Size:10.20X5.20X0.10cm/4.01X2.04X0.04in -Ruler Kit can be used in classroom, office, home or at work, anywhere and whenever you need to use it -Fine craftsmanship and good material ensure that it won't fade or rub off during use -Suitable for art design, score measurement, building templates, architecture, network technology, and drawing -Ergonomically designed anti-skid ruler head makes it hold comfortably -You can easily buy this set of practical Math Geometry Kits at an Package list: 2 x 1 x protractor 1 x straight ruler