Soraco STEM Triangular Ruler, 12-Inch

12 Inch Triangular Engineer Scale Ruler, Anodized Solid Aluminum Core with Laser Etched Scales, Imperial Scale - 1:10, 1:20, 1:30, 1:40, 1:50, 1:60, Ideal for Civil Engineering Drafting (B) : Office Products

Alvin 110P 12 in. High Impact Plastic Architect Triangular Scale

Westcott Scholastic Triangle Ruler, 12, 45 and 90 Degrees with Inking Edge, Clear

Staedtler 12-Inches Architect Triangular Scale (98718-31BK) : Office And School Rulers : Office Products

Architectural Scale Ruler, 12 Inch Aluminium Architect Scale Ruler, Imperial Metal Engineers Triangular Ruler for Architects, Students and Draftsmen, Laser Etched Markings : Office Products