OCM 1 Triangular Architect Scale Ruler (Professional Grade Solid Aluminum) Color Coded 12" Architectural Scale (Imperial Measurements) - Ideal for Architects, Engineers, Draftsman and Students
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IMPERIAL SCALES TRIANGULAR 3 SIDES - 1-1/2", 1, 3/4", 3/8", 3/16", 3/32", 1/2" 1/4", 1/8", 3, 16PROFESSIONAL GRADE SOLID ALUMINUM CORE - Heavy Duty Solid Construction eliminates flex and lays flat for Perfect Lines & Measurements.
COLOR CODED GROOVES - For Quick Scale Identification
CONCAVE DESIGN - Features Smudge Proof Concave Design to Keep Drawings Clean