Super Quality - Made of high quality aluminum alloy with antioxidant coating, corrosion resistant and durable. High precision - 0-90 protractor scale with easy-to-read numbers and continuous permanent scale. Greater digital clarity and precision. Multifunction - 1. Used for angle measurements 2. Use thick edges as a saw guide for cutting. Protractors can be used with square saws for cross cutting or bevel cutting. Versatile - Ideal for all construction projects. It is also useful for hobbyists, builders, makers, home improvement and artists. Customer Service - We strive to offer the best products. If you have any questions or are not satisfied with the product, please do not hesitate to contact us. Product Description Size: 30CM, black Specification Condition: new Material: aluminum alloy Color: black/silver Dimension: 17 cm - 185 * 185 * 260mm 30 cm - 304 * 304 * 425mm 7 inch - 185 * 185 * 260 mm 2 in 1 - 185 * 185 * 260 mm Package weight: approx. 224g / 535g Scope of delivery 1 triangular ruler LRFR is committed to providing each customer with the highest possible quality of customer service.