Helix Professional Engineer's Triangular Scale, 12 Inch, Metal (13371)
Triangular scale is designed for professional engineers with three color-coded, rubber, center strips for easy identification of scales. 12" scale is divided in three with 1-1/2", 1-3/4", 3/8", 3/16", 3/32", 1/2", 1/4" and 1/8" markings per foot. Triangular scale is made of aircraft-grade aluminum.