Spring-Tempered. Satin chrome finish. Quick Reading. Rules with double row of inch figures, and each edge represents the bottom edge reading left to right (rules 1" and wider).
Spring Tempered Steel Rule with Inch Graduations, 6R Style Graduations, 12" Length, 1" Width, 3/64" Thickness. The Starrett 12" Spring-Tempered Steel Rules with Inch Graduation features a satin chrome finish. Graduations at aircraft quick-reading 50ths (.02) on both edges on one side, quick-reading 10ths (.10) on both edges, on opposite side. 12", 6R Grad side.