Wescott Graphic Arts Ruler - 18 inch

Laminated, 2" x 18" ruler, with calibrations in inches, picas, and agate. Also includes proofreader symbols, printers rules, hairline to 12 point, ten percentage screens ranging from 10% to solid, halftone screens, 12-pitch standard and 10-pitch elite typewriter character counters, and a simplified copy casting system.