- Metric Engineer Scale Ruler, Ruler, 12" Aluminum Scale Ruler, Triangular Scale

Mr. Pen- Metric Engineer Scale Ruler, Ruler, 12" Aluminum Scale Ruler, Triangula

Mr. Pen Architectural Scale Ruler, 12" Plastic Architect Scale

12" Aluminum Architect Scale Ruler Set – Imperial & Metric for Drafting & Design

Metric Engineer Scale Ruler, (13 Inch, Black) Architectural Large Scale Ruler...

Mr. Pen Architectural Scale Ruler, 12" Plastic Architect Scale

Mr. Pen- Machinist Ruler, 3 Pack, 6 Inch, Stainless Steel Metric & Imperial, Pre

Mr. Pen- Small Architectural Scale Ruler, Alum. 6 Inch, 2 Pack, Green & Orange