Three sides with six different scales. Engineer's scale with color coded grooves. Engineer's Full divided: 10, 20, 30, 40, 50 and ...
Three Sides With Six Different Scales Architect's Scale With Color coded Grooves Architect's Open Divided: 3/32, 1/8, 3/16, 1/4, ...
Three Sides With Six Different Scales Engineer's Scale With Regular Grooves Engineer's Full Divided: 10, 20, 30, 40, 50 And 60 ...