Professional 30cm Metric Triangular Solid Aluminum Scale Engineering Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 by OCM

OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125

Architectural Scale Ruler, Imperial Measurements 12'', Laser-Etched Aluminum Architect Triangular Ruler Black for Architects, Students, Draftsman, and Engineers by mveohos

Intoy 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