STAEDTLER Professional Triangular Scale Ruler - 12in Metal Architectural Scale with High-Contrast Etched Markings, 6 Imperial Scales for Drafting & Blueprint Reading

BUILT TO LAST - This 12 inch ruler is made from aluminum, giving you a lightweight yet durable tool that stands up to daily use and harsh conditions without warping or wearing down CRYSTAL CLEAR READINGS - The etched black graduations on this drafting ruler pop against the metal surface, making measurements easy to read even after long hours at the blueprint table PRO-LEVEL PRECISION - This scale ruler for blueprints features 3 sides with 6 imperial scales, delivering the accuracy you need for architectural drawings, engineering plans, and detailed drafts DESIGNED FOR PROS - An architect and engineering ruler in one, it's packed with features working professionals demand - from weather-resistant aluminum to fade-proof markings STAEDTLER - Leading manufacturer and supplier of writing, paint, drawing and modeling products that help people around the world realize and share their ideas.