Features: The-ruler body is composed-of an aluminum-alloy ruler and a compass limit block. The limit device and ruler are-made of aluminum-alloy, with a-surface anodized-treatment, which is wear-resistant and rustproof, and has a comfortable-touch. The limit block is composed-of a black aluminum-alloy low disk and a silver rotating disk. The rotating disk is designed with a-pointer in-one! Laser-marking, clear reading, compass-rotation, fast-positioning! Aluminum-alloy ruler, metric and-English double scale mark! The traditional compass design can measure 0-360 degrees and draw lines! Ruler length: 30cm, with a central-chute and round pen hole design, flexible and versatile use! The lightweight ruler body conforms to ergonomic design, reducing pressure on the elbow or wrist! Specifications: Product Name: 360°-Compass Angle Scoring Scale Material: aluminum-alloy body+aluminum-alloy ruler (anodized) Functions: parallel-line, vertical line, cross-line, drawing circle, angle gauge Ruler Length: Approx.30cm/11.81inch Package Includes: 1 Set Marking Gauge Line note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.