Aluminum Architectural Scale Ruler Drafting Ruler Precision 12 Triangular Drafting Tool with Metric Units for Architects Engineers and Students for Blueprinting and Drafting Product description Features: 6 SIDES PROPORTIONSix sides scales design,catering to a wide array of common measurement needs. Its versatile design allows seamless measurement from both right to left and left to right, more convenient to use.A variety of proportions, clear scales and precise proportions, clearly distinguish different sides and different proportions. ALUMINUM ALLOY MATERIAL Aluminum alloy scale ruler with triangular body for safer cutting and scoring of materials.Triangular scale with chamfered edges, giving you a safety guarantee. Every design deserves the quality and precision that the triangular Architect Scale can provide a lightweight and durable feel making it easy to use for any project. ACCURATE SCALEProfessional grade for high accuracy, all measurements are bold and legible, not easy to wear out.Clearly marked scales allow precision drawing for architects, engineers and carpenters.6 types of metric 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. SUITABLE FORThe multi-functional metal scale ruler can be used for cutting, measuring, professional drawing, decoration design, classroom and office use. Good for technical, artists, architects, engineers, blueprints drawer, interior designers, modelers, draughtsmen, graphic designers, teachers, and students. Specifications: Material: aluminium alloy Color: black Size(about): 325x23mm/12.80x0.91inch(LxW) Ruler ratio: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125 Package Included: 1pc x Architectural Scale Ruler Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.