GA-94 (not shown) calibrates inches into 1/16ths and measures picas with an additional centering pica scale.
B-90 has pica, inch, and agate calibrations and a beveled edge. rule with a variety of data and calibrations on both sides including inches, picas and agate measuring as well as proofreader's symbols, printers' rules, hairline to 12 point, ten percentage screens ranging from ten percent to solid halftone.tool printed on clear plastic for ultimate visibility and features basic necessities including inches rule, picas scale, leading gauge, hairline to 12 point line gauge and E-scale. transparent.