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 Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1 Set Marking Gauge Line