Triangular Scale Engineers Ruler, 12 Inch, 98718-34BK

12 Inch Engineer Triangular Scale Ruler with Color Coded Grooves for Accuracy

Triangular Scale Engineers Ruler, 12 Inch, 98718-34BK

Staedtler(R) Engineers Etched Scale

Triangular Scale Engineers Ruler, 12 Inch, 98718-34BK

Staedtler Triangular Scale Engineers Ruler, 12 12 Inch (Pack of 1), White

Staedtler Triangular Scale Plastic Architects Ruler, 12", White (98719-31BK)