Versatile design lets architects work with maximum efficiency. Change units by rotating dial at either end of scale without moving scale from work surface. 12" measuring length 1/32" scale. Exact calibrations. Highest quality aluminum. Adjusts to 1/16 1/8 1/4 1/2 1: 1 and 2: 1. Ruler Type: Triangular Scales; Length: 12 in; Standard Scale: N/A; Metric Scale: N/A. Versatile design for architects.Change units quickly and easily by rotating dial at either end of scale.12" measuring length exact calibrations.Manufactured of the highest quality aluminum.Adjusts to 1/16 1/8 1/4 1/2 1: 1 and 2: 1.Global Product Type: Rulers-Triangular Scales.Ruler Type: Triangular Scales.Length: 12".Material: Aluminum.