XDD NO.503 Drawing set used

Architectural Scale Ruler 12", Metal Engineering Drafting Tool, Triangular, Blue

ALVIN Architect Triangular Scale Ruler 12" Model 110P White (Buy 12 Get 1 Free)

12 Inch Architect Scale Ruler, Aluminum Metric Triangular Scale Ruler for for...

Architectural Scale Ruler, 12'' Imperial 12" Architect Scale, Blue

Staedtler 12-Inches Architect Triangular Scale (98719-31BK)

Soraco 12" Aluminum Triangular Architect Scale Ruler – Laser-Etched Black

Architectural Scale Ruler, 12'' Imperial 12" Architect Scale, Blue