Product Description Useful, versatile, and inexpensive, the Ames Lettering guide is simple to operate and provides:- three different systems of letters most widely used by draftsmen. Drawing the two slope lines-a means of drawing guide lines for letters from 1/16 to 1.5 in height. For cross-sectioning, drawing brick, siding shingles, etc. Equal measurementsin 1/8 inch for headlines Metricmeasurements Lowercase letterswill be 3/5 the size of capital letters Even spacing Createparallel or perpendicular lines Easily createconsistent check marks