Solid. Unlike engineer rulers with printed graduations, our engineer ruler is made of solid anodized aluminum. 100% laser-etched graduations for perfect accuracy. Quality and chamfered edges: Updated triangular ruler with chamfered edges for safety. Every design deserves the quality and accuracy of the triangular architect ruler. 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. Scales graduated in two directions for easy reading from right to left or left to right. Many uses: 30 cm - Weight: 100 g. Easy to carry and store. Handy measuring tool for any project. Ideal for architects, draftsmen and students.Ruler Feature:Accurate graduations.Chamfered edges.Anti-rust.3 concave sides with 6 different scales.Easy to carry.High quality solid aluminum.The ruler is the perfect tool for architects, draftsmen, engineers and students.Features:High quality anodized aluminum.The ruler is approximately 30.5 cm long and has 3 concave sides with 6 of the most commonly used scales: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125.Stylish black finish, durable.