Alvin Series French Curve Set of 4

ALVIN French Curve Ruler Set of 4 Model FC44 Drafting Drawing Measuring Tool Multipurpose for Design Engineering and Architecture Great for Students and Professionals - 5.25", 6.5", 12.5", and 10.25"

ALVIN FC3391 French Curve Ruler, Drafting Drawing Measuring Tool, Multipurpose for Design, Engineering, and Architecture, Great for Students and Professionals - 8 Inches

Alvin AS680 6" & 8" Transparent Triangle Set