Sands & Sons has been making tools for over 100 years, and we have a gem of a straightedge from their long list of tools. Made of bright anodized extruded aluminum, it measures 24" long x 2" wide and 3/16 " thick. The face is easy to read; black graduations are marked in 1/16ths and reverse reading. Accurate to .0005 per inch of length. Made in the USA.