Starrett CH604R-12 Spring-Tempered Steel Rules with Inch Graduations, 4R Style Graduations, 12″ Length,1″ Width, 3/64″ Thickness, with Hook Review GreedyGangster Rulers July 25, 2018October 5, 2018Linear Measurement, Measuring & Layout Tools, Starrett, Tools & Home Improvement 0 Comment Starrett 12″ spring-tempered steel rules with Inch graduations feature a satin chrome finish. Graduations at 8ths, 16ths, Quick-Reading 32nds, 64ths. Features single row of inch figures.