I’ve been creating designs in Adobe Illustrator and executing them using shop tools. One problem with Illustrator is that it doesn’t really support eighths, sixteenths, and smaller divide-by-two subdivisions of an inch. It uses decimal fractions of an inch.
So, I went looking for an inch ruler which is subdivided decimally. The best I found so far is the Alumicolor Engineer, which has six scales, including tenths and fiftieths, and is extremely well made.