Darice 24-Inch Aluminum T-Square Aluminum T-Square shows both-inch and centimeter/millimeter measurements. Features plastic head fixed to aluminum shaft, peggable lower end and lays flat. Ruler calibrates to 24-inches (60-centimeters) with calibrations down to 1/32 of an-inch for the first 3-inches and 1/16-Inch for the remainder of the ruler. Sold in its own pouch that snaps shut for easy and protective storage.