Full Flexible Steel Rule with Inch Graduations, 6R Style Graduations, 12" Length, 1/2" Width, 1/64" Thickness. The Starrett 12" Full-Flexible Steel Rule with Inch Graduation features a satin chrome finish. Graduations are on one side only, quick-reading 10ths (.10) on top edge; aircraft quick-reading 50ths (.02) on bottom edge. The steel rule features a single row of inch figures. 12", 6R Grad, Full-Flexible figures.