Photo 1 of ALVIN Rolling Parallel Ruler, Multipurpose Ruler Balancing Scale, Drafting and Architecture Drawing Tool, Great for Students and Professionals 12 inches

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Photo 1 of ALVIN Rolling Parallel Ruler, Multipurpose Ruler Balancing Scale, Drafting and Architecture Drawing Tool, Great for Students and Professionals 12 inchesPhoto 2 of ALVIN Rolling Parallel Ruler, Multipurpose Ruler Balancing Scale, Drafting and Architecture Drawing Tool, Great for Students and Professionals 12 inches