Metal Scale Ruler,Aluminium Triangular Ruler for Architects & Engineers,Matrix 30cm Solid Aluminium Ruler:1:100,1:200,1:250,1:300,1:400,1:500(Black)

✅ PREMIUM QUALITY:This engineering triangle scale is made of anodized aluminum alloy, very solid and sturdy. Designed for maximum durability, this 3 sided metal architect ruler is perfect for lasting use. ✅PRECISE IMPERIAL SCALE: The aluminum triangle ruler is professional grade with supreme accuracy. With reliable construction and accurate performance, the black construction ruler is ideal for architects, engineers, draftsmen and students. ✅6 METRIC SCALES>:Length:30cm. Includes 6 commonly used scales: 1:100、1:200、1:250、1:300、1:400、1:500. Six rulers in one. No need to waste time figuring out how to measure each increment. ✅LASER ETCHED TECHNOLOGY:All numbers and measurement markings on drafting scale rulers are laser etched for maximum clarity and readability. Laser etched technology effectively prevents scale numbers and markings from wearing off or fading away. ✅SERVICE:If you are unsatisfied with your purchase, we will offer a full refund, no questions asked.