Intoy 12 Inches Engineering Scale Ruler With 3 Features Improved and new manufacturing process applied, Our Intoy Triangular Scale is the perfect tool for any architect, draftsman, engineer, or student 1. Laser Engraving(Laser etched) Techniques Applied. Reliable Scale Never Fade We improve the scale print technology. Instead of "print the scale on the ruler body", we use laser engraving(Laser-etched)which makes the scale marks never fade under any regular use. The scale etched permanently on the aluminum body surface. You won't worry about the inches fade any more. 2. Solid Aluminum Triangular Body. Anodic Oxidation Black Color Surface Constructed of high-grade anodized aluminum this ruler provides a lightweight and durable feel making it easy to use for any project. What's more, this allows the ruler to lay flat on the drawing surface for precise and accurate placement. The concave design feature helps reduce smearing for clean pencil lines. 3. Quality, Precision and Legible Scale Every design deserves the quality, precision and Legible Scale that the Intoy Triangular Architect Scale can provide. 4. 3 Sides With 6 Different Scales Imperial Scale: 1:10, 1:20, 1:30, 1:40, 1:50, 1:60. Ideal for Blueprint, Professional Applications, Architecture, Civil Engineering, Drafting and Technical Illustration. Just Use For your Next Project Best Triangular Scale ever with our new techniques process. You deserve the best one. This is exactly what you are looking for. BUY the new Laser Engraving Scale Ruler for your next project.