Solid. Unlike printed graduation engineer's rulers, our engineer's ruler is made of solid anodized aluminum. 100% laser graduation for perfect precision. Quality and chamfered edges: Updated triangular ruler with chamfered edges for safety. Every design deserves the quality and precision that the triangular architect's rule. Lightweight and durable ruler, easy to use for any project. Made of high-quality anodized aluminum, this ruler is very durable. All-in-one ruler: The metric ruler includes 6 of the most commonly used scales: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125. No need to waste time figuring out how to measure each increment. Graduated scales in two directions to be easily read from right to left or left to right. Many uses: 30 cm - Weight: 100 g. Easy to take and store. Practical measuring tool for any project. Ideal for architects and architects.