The Pocket Multifunctional Pocket Engineering Ruler Engineering Drawing Protractor Discover the ultimate tool for engineering with our Multifunctional Engineering Ruler. Compact design for easy portability. Accurate measurement for detailed engineering drawings. Versatile functionality, suitable for engineering tasks. Enhance your drawing accuracy and efficiency with this essential engineering tool. Color: Black Material: iron Package Contents: 1 x industrial equation ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.