Alumicolor 3000 Series 12-Inch Silver Hollow Aluminum Triangular Engineer Scale (3230-1)

Alumicolor 3000 Series 12-Inch Black Hollow Aluminum Triangular Architect Scale (3030-9)

Equilibrium Architects Scale - 12 Inch Triangular Aluminum Drafting Scale Ruler in Common Imperial Units - Great Gift for Engineers Draftspeople Students and More (12" Imperial Units, Matte Aluminum)

Alumicolor 3210-1 3000 Series Engineer Pocket Scale, Silver

Alvin 98/ARC 12" Black Aluminum Architect Triangular Scale

Arteza 12" Triangular Architect Scale Aluminum Color-Coded Grooves (Imperial)

Alumicolor 3000 Series 6-Inch Blue Mini Aluminum Triangular Engineer Scale (3210-5)

Alumicolor 3000 Series 6-Inch Red Mini Aluminum Triangular Engineer Scale (3210-4)

Pro Art 12-Inch Architectural Triangular Scale

eBoot Large Triangle Ruler Square Set, 30/ 60 and 45/ 90 Degrees, Set of 2